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Kasa Smart Dimmer Switch HS220 Review

The Kasa Smart Dimmer Switch HS220 is a Wi-Fi smart wall switch designed to add remote control, voice control and scheduled dimming to compatible home lighting circuits. It stands out for easy setup, strong app support and broad Alexa and Google Home compatibility. Its main limitation is that it only works in single-pole setups with a neutral wire and 2.4 GHz Wi-Fi.
Expert reviewed
86
Overall score
Data-driven scoring Expert reviewed Updated analysis

Why we ranked it highly

The Kasa Smart Dimmer Switch HS220 is a single-pole Wi-Fi dimmer switch for households that want smarter lighting without adding a separate hub. It replaces a standard wall switch and adds app control, voice control through Amazon Alexa and Google Assistant, brightness adjustment, schedules, countdown timers and an Away Mode for automated lighting when nobody is home. The product is clearly aimed at users who already have compatible wiring and want a low-cost smart home upgrade for bedrooms, living spaces, hallways or outdoor lighting circuits. Its strongest appeal is practical everyday convenience: controlling lights from a phone, setting routines and adjusting brightness without extra accessories. The main buying constraint is compatibility. It requires a neutral wire, works only on single-pole circuits and needs a secured 2.4 GHz Wi-Fi connection. Review feedback is broadly positive, though some buyers report occasional connectivity issues, limited dimming range or units that stop working.
90-day review Expert reviewed User feedback Data scoring

Key specs

Features & Specs

Operation Mode
Automatically,Off,Smart Switch
Current Rating
2.5 Amps
Operating Voltage
120 Volts (AC)
Contact Type
Normally Closed
Connector Type
Screw
Switch Type
Dimmer
Terminal
Spst
Circuit Type
1-way
Mounting Type
Pole,Wall Mount
Actuator Type
Push Button
Number of Positions
2
Lower Temperature Rating
32 Degrees Fahrenheit
Upper Temperature Rating
104 Degrees Fahrenheit
Controller Type
Amazon Alexa, Android, Google Assistant, iOS
Control Method
Voice
Connectivity Protocol
Wi-Fi
Wattage
300 watts
Control Type
Remote, Voice
Compatible Devices
Amazon Alexa, Google Assistant
Smart Home Compatibility
Smart Home Compatible

Additional details

Color
White, Alexa Compatible

Measurements

Item Dimensions
1.77 x 3.35 x 5.04 inches
Unit Count
1.0 Count
Number of Items
1

Materials & Care

Material Type
Polycarbonate
Contact Material
Copper

User guide

International Protection Rating
IP00
Specification Met
UL

Item details

Brand Name
Kasa Smart
Model
HS220
Global Trade Identification Number
00845973083724
Manufacturer
TP-Link
UPC
840460604987 845973083724
Part Number
HS220
Item Type Name
Dimmer by TP-Link – WiFi Light Switch
Included Components
1 HS220 Smart Wi-Fi Light Switch, Dimmer, 1 Wall Plate, 2 Wire Nuts, Wire Label sheet, Quick Installation Guide
Item Weight
0.24 Pounds

Scores breakdown

85 /100

Performance

88 /100

Features

82 /100

Safety

78 /100

Comfort

90 /100

Ease of use

92 /100

Space efficiency

72 /100

Noise

84 /100

Design

Strengths

  • Easy app-guided setup and generally straightforward installation for compatible single-pole circuits with a neutral wire.
  • Works with Amazon Alexa and Google Assistant for hands-free lighting control.
  • Strong automation options including schedules, timers, countdowns and Away Mode.
  • Good value based on price, smart features and large volume of positive buyer feedback.
  • Compact wall-switch format adds smart dimming without needing a separate hub.
  • Users regularly praise the Kasa app for remote control and brightness adjustment.
  • High customer satisfaction across a very large review base suggests broad everyday usability.

Limitations

  • Requires a neutral wire, so it will not fit every home without wiring compatibility.
  • Designed for single-pole use only, limiting where it can be installed.
  • Requires a secured 2.4 GHz Wi-Fi network and may not suit homes relying mainly on 5 GHz-only setups.
  • Some buyers report connectivity issues or devices that stop working over time.
  • Dimming performance gets mixed feedback, with some users noting a narrow dimming range.
  • The switch body can be bulky, which may make tight wall boxes harder to work with.
  • Some users mention a slight delay or small noise when switching lights on or off.

Ideal user profiles

  • Homeowners wanting a low-cost way to add smart dimming to existing light circuits.
  • Alexa or Google Home users who want voice control for room lighting.
  • People with compatible single-pole wiring and a neutral wire already available.
  • Users who want app-based schedules, timers and away-lighting routines.

Use cases

  • Adding voice-controlled dimming to living room or bedroom lighting.
  • Creating scheduled lighting routines for mornings, evenings or bedtime.
  • Using Away Mode to make the home look occupied when no one is in.
  • Adjusting LED light brightness from the Kasa app without going to the wall switch.
  • Setting a gentler fade-off routine for children's rooms at night.
  • Upgrading a standard single-pole wall switch without adding a separate hub.

Fit and positioning

Who this works for

Category positioning

This product sits squarely in the smart home and home lighting control category rather than general electrical hardware. Its main role is to upgrade an existing wall switch so lights can be dimmed, scheduled and controlled remotely as part of a daily home routine. For households already using Alexa or Google Assistant, it functions as an affordable entry point into automated lighting, though its use is narrower than a universal switch because of its single-pole and neutral-wire requirements.

Best for

The HS220 is best suited to homeowners or renters with permission to replace switches, especially those already using Alexa or Google Home and wanting smarter control over living room, bedroom or hallway lighting. It makes the most sense for people with compatible single-pole wiring, a neutral wire in the box and a stable 2.4 GHz Wi-Fi network. Buyers focused on low-cost automation, simple scheduling and app-based dimming are the clearest match.

Not best for

It is less suitable for homes without a neutral wire, for multi-way lighting circuits, or for buyers who want a universal fit with minimal compatibility checks. It may also frustrate users who are sensitive to occasional connection issues, a slight switching delay or mixed dimming performance. If your wall box is already crowded, the switch's bulkier body may make installation less convenient.

Home use

In everyday home use, the HS220 mainly adds convenience to regular lighting tasks. It allows lights to be turned on, off or dimmed from the wall, through the app or by voice, which is useful for bedtime routines, entering dark rooms or automating lights when away. The scheduling tools and fade features make it practical for daily comfort rather than just novelty smart control.

Performance analysis

How it performs in practice

Each scoring dimension is separated into a compact card so the strengths and tradeoffs are easier to compare without reading one long block.

Performance analysis

For its main job of smart dimming and remote lighting control, the HS220 appears to perform well overall. Reviews regularly praise quick response through the app, reliable voice control with Alexa and Google Assistant, and practical scheduling features that fit everyday routines. Buyers also report that brightness can be tuned for LED lighting in some setups. The main performance caveats are mixed reports around Wi-Fi stability, a slight on/off delay for some users and feedback that the dimming range can feel limited depending on the bulbs and circuit used.

Feature analysis

The feature set is strong for a budget smart dimmer. It includes app-based remote control, voice assistant support, brightness adjustment, timers, countdowns, scheduling, Away Mode and a gentle fade-off option. These features are practical rather than experimental, and they cover most of what buyers expect from smart lighting control. The main limitation is not the feature list itself but the wiring and network requirements needed to use it.

Safety

Safety depends heavily on correct installation and proper electrical compatibility. The switch is specified for 120V AC operation, requires a neutral wire and is intended only for single-pole wiring, so using it outside those limits would be inappropriate. The listing also advises consulting a professional electrician if you are unfamiliar with basic wiring, which is important advice for this product category. UL certification is listed, which supports baseline compliance expectations, but buyers should still ensure load, wiring type and installation environment are suitable before fitting it.

Comfort

The comfort benefits come from flexible lighting rather than physical comfort features. Being able to dim lights, automate evening routines and use a gentle fade-off function can make bedrooms and living spaces feel more adaptable throughout the day. Voice control also reduces friction in daily use, especially when hands are full or when entering a dark room.

How it compares

Within the smart dimmer category, the HS220 appears stronger than average for setup simplicity, app quality, voice assistant support and overall value. It is especially appealing for buyers who want useful automation without needing a separate hub or a more complex home automation system. Compared with the wider category, it looks less universal in installation terms because it depends on a neutral wire and single-pole wiring. It also does not entirely avoid the reliability and connectivity complaints that affect many Wi-Fi smart switches. Even so, its broad review base and practical feature set make it one of the more accessible options in its segment.

Ranking summary

The HS220 ranks well because it combines strong smart home functionality with easy daily use and broad buyer approval at a low price. It performs particularly well in areas that matter most for a smart dimmer: app setup, voice assistant integration, scheduling and practical household convenience. Its ranking is held back by clear compatibility limits, including the need for a neutral wire and single-pole wiring, along with a smaller but meaningful set of complaints around connectivity, dimming range and long-term reliability. Overall, it stands out as a strong mainstream option for compatible homes rather than a universal fit for every lighting setup.

Buying advice

Consider the HS220 if you want an affordable smart dimmer with app control, Alexa or Google voice support, and useful automation such as schedules and Away Mode. It is a particularly good fit for bedrooms, living rooms and other spaces where dimming adds practical value. Avoid it if your switch box lacks a neutral wire, if you need a multi-way switch solution, or if you want the broadest possible compatibility with minimal setup checks. Before buying, confirm your wiring type, verify you have a 2.4 GHz Wi-Fi network, check that your wall box has enough room, and make sure your connected bulbs are suitable for dimming.
86
Overall score

Final verdict

The Kasa Smart Dimmer Switch HS220 is a strong option in the smart lighting category for homes with the right wiring. Its main strength is the combination of easy setup, useful automation and dependable day-to-day convenience through the Kasa app and voice assistants. Its main limitation is compatibility: the neutral-wire and single-pole requirements rule it out for some households, and there are mixed reports about reliability and dimming behaviour in some installations. If your home is compatible and you want a low-cost route into smarter lighting control, it is a sensible and well-supported choice.
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Key topics

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Frequently asked questions

Is the Kasa Smart Dimmer Switch HS220 easy to install?
For a compatible setup, most buyers describe installation as straightforward, and the app provides guided steps. The main caveat is wiring compatibility: this switch needs a neutral wire and only works in single-pole installations. If you are not comfortable with electrical work, professional installation is the safer option.
Does the Kasa HS220 require a neutral wire?
Yes. A neutral wire is required, and the listing is clear that installation cannot be completed without one. This is one of the most important checks before buying, especially in older homes where a neutral wire may not be present in the switch box.
Does the Kasa Smart Dimmer Switch HS220 work with Alexa and Google Home?
Yes. The switch supports Amazon Alexa and Google Assistant for voice control, and many reviews specifically praise that integration. Buyers commonly use it for hands-free lighting control, routines and scheduled lighting as part of a wider smart home setup.
How reliable is the Kasa HS220 in daily use?
Buyer feedback is generally positive, but reliability is not flawless. Many users report stable day-to-day operation and good Wi-Fi retention, while some mention connectivity problems or switches that stop working. It appears dependable for many households, but there is a visible minority of mixed long-term reports.
Is the dimming performance good on the Kasa HS220?
The dimming feature is a core selling point and many buyers are happy with brightness control through the app and switch. However, review feedback is mixed, with some users saying the dimming range feels narrower than expected. Results may also depend on the bulbs installed in the circuit.
Does the Kasa HS220 need a hub?
No. This is a Wi-Fi smart dimmer that connects directly to a secured 2.4 GHz home network, so a separate smart home hub is not required. That keeps setup simpler, but you do need suitable Wi-Fi coverage where the switch is installed.
Is the Kasa Smart Dimmer Switch HS220 good value?
It appears to offer strong value if your wiring is compatible. The low purchase price, broad smart home support, scheduling features and large volume of positive reviews make it appealing for budget-conscious smart lighting upgrades. Its value drops if you need electrical changes to make it compatible.
Can the Kasa HS220 be used in any home?
No. It is limited to 120V single-pole installations and requires a neutral wire, so it is not universally compatible. Review feedback also highlights that it is designed for US-style electrical setups, making it unsuitable for homes using incompatible voltage standards.

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