A: It's about 0.81".
A: Technically yes, but the wired switch will need to always be on for our wireless switch to communicate with the receiver. If that doesn't work for you but you'd like a 3-way setup I'd suggest purchasing a 3-way kit that will work a little more simply.
A: The likelihood of a receiver needing maintenance is low, since they're engineered for 20+ years of use in commercial settings, but not impossible. It may make more sense to install at a fixture or circuit breaker.
|Name||Simple Wireless Light Switch Kit, No-Wires and Battery-Free Light Switches for Home (1 Receiver and 1 Light Switch)||Caseta Deluxe Smart Switch Kit with Smart Bridge, 2 Smart Switches, Remote in White||Single-Pole Smart Home Push Button Rocker Light Switch with Wi-Fi, White (10-Pack)||Caseta Smart Switch for All Bulb Types or Fans, 5A, White (6-Pack)|
|Switch Style||Rocker||Push Button||Rocker||Push Button|
|Voltage||120 volt,240 volt,277 volt||120 volt||100 volt,220 volt||120 volt|
|Mounting Type||Screw-In,Surface Mount,Wire-In,Wireless||In-Wall||Wall Switch||In-Wall|
|Electrical Features||Kit,Remote Control,Wall Plate Included||Indicator Light,Programmable,Wall Plate Included||Wall Plate Included||Indicator Light,Programmable|
|Number of Switches||Single||Single|
|Works With||Alexa, Apple HomeKit, Ecobee, Google, Google Assistant, Logitech Harmony, Lutron, Samsung SmartThings, Siri|
|View Product||View Product||View Product||View Product|