Upgrade Neutral wire required versionUniversal version(Can be connected with neutral wire; Do not need connect the neutral line but need connect the capacitor) 1. Luxury glass panel -- Resist deformation, fading and scratches,easy to clean. 2. Capacitive touch sense -- Sensitive touch control feeling like iphone touch. 3. Waterproof -- Suitable for humid environment. 4. Voice control -- Works perfectly with Amazon Alexa,Google Home,Yandex Alice. 5. Remote control -- Turn on/off light anytime anywhere, never worry about forget turn off the light. 6. Timing/Countdown/Schedule -- Turn off the lights regularly. 7. Group Control -- Set all of your smart switches in a group on app. Then one-click to turn/off all of your lights by smartphone. 8. Share Control -- Share Control with family for added convenience. 9. Intelligent scene linkage -- Creating your own scene to trigger ON/OFF home appliances by departure mode, home mode, temperature, humidity, or other environmental conditions.It needs to be matched with other tuya products to achieve) 10. Two-way control -- Set on APP, easy installation and wiring both 1/2/3 gang all have 2 way function. Notes: EU is square(86mm*86mm) US is rectangular (120mm*74mm) Only supports 2.4G network