GE

GE CSWDMOCBWF1NN Smart Dimmer Switch Motion Sensor No Neutral

4.0 (2291 reviews)

Smart dimmer switch with built-in motion sensor, no neutral wire required, and app plus voice control.

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Overview

The GE CYNC Smart Dimmer Switch with Motion Sensor is designed to bring smart lighting control to homes that lack neutral wiring at the switch box — a common limitation in homes built before the 1980s. By requiring only a ground wire and 2.4 GHz Wi-Fi, it dramatically expands the number of households that can adopt smart lighting without rewiring. Beyond basic smart dimming, the switch integrates a motion sensor and ambient light detector directly into the switch plate, allowing it to automatically turn lights on when you enter a room, dim them based on available natural light, and switch them off when the room is empty.

Control extends well beyond the wall plate. The CYNC app (powered by Savant) provides remote dimming, scheduling, and scene creation from anywhere, so you can simulate occupancy while away or set lights to gradually brighten in the morning. Voice control through Amazon Alexa and Google Home adds hands-free convenience with no hub required. The 15-watt minimum circuit requirement is worth noting during planning — for circuits with very low-wattage LEDs, the included bulb adaptor helps meet this threshold. For homeowners looking to combine energy-saving automation with smart home integration in a single, no-neutral-wire switch, the CYNC Smart Dimmer delivers a practical and well-rounded solution.

Key Features

Make Traditional Dimmable Bulbs Smart: The smart motion sensor light switch allows you to upgrade your smart home and make any bulb in the house smart; Control lights from the switch or the Cync App, powered by Savant using scheduling and scenes

Convenient Smart Switch Control: Experience ultimate convenience with a motion sensor switch that offers remote control dimming and scheduling via the CYNC App for a well-lit home, even when you are away

Save Energy and Money: Motion and ambient light detection sensor turn LED light bulbs on or off based on the amount of natural light or motion in the room to save you energy and money

WiFi Light Switch Voice Control: Connect the smart dimmer switch to Google Home and Amazon Alexa devices (sold separately) for hands-free voice control; No hub required

Easy Installation: This smart light switch requires a ground wire and 2.4 GHz WiFi to enable smart control, no neutral wire required; For homes built pre-1980s, check bulb compatibility before purchasing. For more information on wiring compatibility, please view the 3-Wire (No Neutral Required) Switch Compatibility & Wiring Configurations Product Guide Section below

Specifications

Brand
GE (CYNC)
Model
CSWDMOCBWF1NN/ST1P
Switch Type
Smart Dimmer with Motion Sensor
Wiring
3-Wire, No Neutral Wire Required (ground wire required)
Connectivity
Bluetooth and 2.4 GHz Wi-Fi
Voice Control
Amazon Alexa, Google Home (devices sold separately)
Sensors
Motion detection, Ambient light detection
App
CYNC App (powered by Savant)
Hub Required
No
Minimum Circuit Wattage
15W (bulb adaptor included for medium base bulbs under 15W)
Features
Dimming, Scheduling, Remote Control, Scene Setting, Out-of-Home Control

Pros & Cons

👍 Pros

  • No neutral wire required, enabling installation in older homes where neutral wires are not present at the switch box
  • Built-in motion and ambient light sensors automate lighting based on occupancy and natural light levels
  • Works with both Alexa and Google Home for voice control without a separate hub
  • CYNC app allows remote dimming, scheduling, and scene creation from anywhere
  • Serves as both a dimmer and a motion-activated switch in a single device

👎 Cons

  • Requires a minimum of 15 watts on the circuit, which may be an issue with very low-wattage LED bulbs
  • Only connects via 2.4 GHz Wi-Fi, so it will not work on 5 GHz networks
  • Limited to the CYNC app ecosystem and does not support third-party platforms like HomeKit
  • Motion sensor sensitivity and timeout settings may require trial and error to optimize for your specific room layout

Frequently Asked Questions

No. The GE CYNC Smart Dimmer is designed as a 3-wire switch that does not require a neutral wire, making it compatible with older home wiring. It does require a ground wire and 2.4 GHz Wi-Fi.
The switch requires a minimum of 15 watts on the circuit. If your bulbs total less than 15 watts, a bulb adaptor for medium base bulbs is included to meet the requirement.
The switch includes both motion detection and ambient light sensing. It can automatically turn lights on when motion is detected and off when a room is unoccupied, and it adjusts based on the amount of natural light in the room.
No hub is required. The switch connects directly via Bluetooth and 2.4 GHz Wi-Fi, and it integrates with Amazon Alexa and Google Home for voice control.
Yes. The switch functions as a standard dimmer when operated physically. Smart features like scheduling, remote control, and motion sensing work in addition to manual operation through the CYNC app.