Kasa Smart 3 Way Dimmer Switch KIT, Dimmable Light Switch Compatible with Alexa, Google Assistant and SmartThings, Neutral Wire Needed, 2.4GHz, ETL Certified, No Hub Required, White (KS230 KIT v2)
Quick take
This Kasa 3-way smart dimmer switch kit replaces traditional 3-way switches so you can dim lights from the wall, in the Kasa app (or Tapo app), and through voice control with Alexa or Google Assistant. It is a strong option for hallways, stairways, and other multi-switch setups where you want schedules and remote brightness control, as long as you have a neutral wire and a 2.4GHz Wi-Fi network. Expect the biggest hurdle to be 3-way wiring and physical fit in older or cramped electrical boxes.
Pros and cons
Pros
- App and voice control for a 3-way dimming setup (Alexa and Google Assistant supported, SmartThings compatibility).
- 1% to 100% dimming with scheduling, letting you set brightness for on/off routines.
- ETL certified, and designed for incandescent bulbs up to 300W or dimmable LED bulbs up to 150W.
- Setup and dimming are described as smooth once the wiring is correct, with reports of no flicker or whining.
Cons
- Requires neutral wiring and 2.4GHz Wi-Fi, which can rule it out for some homes.
- 3-way installation can take trial and error, especially when your wiring doesn’t match diagrams.
- Some buyers report Wi-Fi setup hiccups that may require reset or restart.
- The switches can be bulky, so older homes or tight gang boxes may need extra clearance or minor box adjustments.
What buyers think
Buyer-review evidence is broadly positive on the end result: the kit is repeatedly described as a good-looking, well-built smart dimmer that is easy to control after installation. A common theme is that the switches work smoothly and dim without undesirable behavior (such as flicker), and that the Kasa app experience is straightforward, including the ability to adjust/calibrate dimming levels for different dimmable bulb designs.
Installation feedback is mixed in the middle, not in the final outcome. Many comments frame setup success as being tied to getting the 3-way wiring right, and a subset of buyers notes that physical fit in older or cramped electrical boxes can be challenging because the devices are fairly “meaty.” A smaller set of reports also points to occasional Wi-Fi connection issues during initial setup, often resolved with reset/restart steps.
What this kit is for
The KS230 kit is built for homes that need 3-way dimming, where lights are controlled from two locations (for example, a hallway or stairway). Instead of using a standard switch pair, you replace the existing 3-way switches with a smart dimmer setup that lets you adjust brightness locally and remotely.
Key requirements you should check before buying
Neutral wire and 2.4GHz Wi-Fi are required
This smart dimmer requires a neutral wire for installation. It also uses 2.4GHz Wi-Fi for setup and ongoing control. If your wiring does not include neutral at the switch location, you may need a different solution (for example, a device designed for non-neutral installs, or professional help to confirm feasibility).
It supports dimmable bulbs with wattage limits
It’s rated for incandescent bulbs up to 300W or dimmable LED bulbs up to 150W. Also note that dimming function does not support smart Wi-Fi bulbs, so it is best matched with standard dimmable bulbs (incandescent or dimmable LEDs).
Control experience: voice, app, and scheduling
When installed, you can control lighting through the switch itself and through the Kasa app, with voice control via Alexa and Google Assistant. The kit also supports scheduling, so you can set lights to turn on and off with a chosen brightness level. That’s particularly useful if you want “gentle wake” lighting, night-time comfort lighting, or routines when you are away.
Installation and setup: where buyers spend time
Expect 3-way wiring to be the real challenge
Most “it works great” feedback pairs with a reminder that 3-way wiring can require trial and error, especially if your home’s wiring layout does not perfectly match printed diagrams. If you are not comfortable identifying travelers and matching them correctly, consider getting help or taking your time during setup.
Bulky fit can matter in older boxes
Several buyers mention that these switches are fairly large and may be a tight squeeze, particularly in older homes or when using certain metal covers. If you have limited clearance behind the wall plate, you may want to plan for possible box adjustments to avoid interference.
Pros and cons (real-world buyer lens)
Best for
- People upgrading 3-way lighting in stairways, hallways, and other two-location switch setups.
- Buyers who want dimming control plus scheduling, not just on/off automation.
- Homes where neutral wiring and a stable 2.4GHz Wi-Fi network are available.
- Anyone using dimmable incandescent or dimmable LED bulbs within the stated wattage limits.
Who should avoid it
- If you do not have a neutral wire at the switch location, this may not be the right fit.
- If you need to rely on smart Wi-Fi bulbs for dimming through the switch, this kit is not intended for that scenario.
- If you want the simplest possible swap with minimal box space concerns, the physical size and 3-way wiring complexity could be a mismatch.
Is it worth it?
The Kasa Smart 3-way dimmer switch kit is worth considering if you specifically need 3-way dimming with smart control and scheduling, and you can meet the requirements (neutral wire and 2.4GHz Wi-Fi). The most convincing case comes from consistent feedback that once wiring and setup are handled correctly, the dimming behavior is smooth and the app and voice control are enjoyable to use. The main “buyer caveat” is that success depends on correct 3-way wiring and enough space in the wall box.
Alternatives to consider (by buyer priorities)
If this kit’s requirements or fit do not match your situation, look at alternatives through these decision points:
- If you lack a neutral wire: search for a smart 3-way dimmer designed for non-neutral installs (or consider a different upgrade path with professional evaluation).
- If you need broader bulb compatibility: focus on dimmers that explicitly state compatibility with the bulb types you already own, especially if you use LED mixes.
- If box space is very limited: prioritize slimmer dimmer models intended for tight electrical boxes to reduce the odds of needing box modifications.
- If your priority is on/off rather than dimming: you may save effort by choosing a smart 3-way switch that does not require dimming calibration considerations.
FAQ
Does this smart dimmer require a neutral wire?
Yes. This kit requires a neutral wire for installation.
What Wi-Fi network does it use?
It requires 2.4GHz Wi-Fi for setup and smart control.
What types of bulbs work with it?
It supports incandescent bulbs up to 300W and dimmable LED bulbs up to 150W. The dimming function is intended for compatible dimmable bulbs, and it does not support dimming for smart Wi-Fi bulbs.
Is it hard to install a 3-way smart dimmer?
3-way wiring can be tricky, especially if your existing wiring does not match diagrams. Many buyers report success, but installation can take trial and error if you are not familiar with identifying traveler wires.
Will it fit in older or tight electrical boxes?
Some buyers report the switches can be bulky and difficult to fit in tight spaces. If your wall box has limited clearance, measure ahead of time or be prepared for possible box adjustments.
Can it be used with Alexa and Google Assistant?
Yes. It supports voice control with Alexa and Google Assistant, and it is compatible with SmartThings.
Does it support schedules?
Yes. You can set schedules to turn lights on and off with a chosen brightness level.
Specifications
| Product Title | Kasa Smart 3 Way Dimmer Switch KIT, Dimmable Light Switch Compatible with Alexa, Google Assistant and SmartThings, Neutral Wire Needed, 2.4GHz, ETL Certified, No Hub Required, White (KS230 KIT v2) |
|---|---|
| Category | Tools & Home Improvement > Electrical > Switches & Dimmers > Wall Switches > Dimmer Switches |
| Brand | Kasa Smart |
| Manufacturer | TP-Link |
| Color | White |
| Material | Plastic |
| Item Weight | 0.4 Pounds |
| Operation Mode | ON-OFF |
| Operating Voltage | 120 Volts (AC) |
| Contact Type | Normally Closed |
| Connector Type | Screw |
| Switch Type | Dimmer |
| Terminal | Spst |
| Circuit Type | 3-way |
| Mounting Type | 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 |
| Control Method | Touch |
| Connectivity Protocol | Wi-Fi |
| Wattage | 300 watts |
| Control Type | Full |
| Compatible Devices | Alexa, Google Assistant, SmartThings |
| Smart Home Compatibility | Smart Home Compatible |
| Item Dimensions | 5.06 x 3.33 x 1.77 inches |
Available variants
Style
- Motion Sensor
- Motion Sensor + Dimmer
- 3-Way Dimmer
Size
- 1-Pack
- 2-Pack
- 2 Switch KIT
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