1.Easy replace your traditional dimmer light switch to smart,can make your exist 3 way switch smart also,just install 1 DIY smart dimmer switch, 2.COMPATIBLE WITH LEGACY SWITCHES: Wi-Fi Module Smart Switch is an upgraded version compatible with your legacy switches. You can use this switch module to connect and keep the original switch. Keep the look and feel of your favorite switch while enjoying your smart home. 3.Wi-fi control via your mobile phone 2.4G Networks provides the needed connection to the DIY Switch Dimmer Module without the need of a separate HUB. 4.Uses popular"Smart life/Tuya"Android / IOs app Versatile APP Allows for Full Control of Your Lights or Compatible Appliances. Multiple Program Options Allow You to Plan the Exact Time to Turn Lights On/Off Automatically. 5.Give your devices the ultimate power on/off smart makeover,Simply Wire this Do-It-Yourself Module between your Device and Power Source to convert most Compatible Products to a . Product Specification color: White Material: ABS Wiring: Zero fire wire Input voltage: AC85~250V50/60Hz Maximum current: 10A/2200W Standby power: 0.5W Wireless range: 45M Wireless frequency: 2.4GHz Wireless standard: IEEE 802.11b/g Operating temperature: 0C~60C (32 down~140F) Operating Humidity: 1%~85%RH (non-condensing.) Product size: 54 x 42 x 23mm Features: Tuya Smart-WiFi version, app control, dual control once open Package Contents: 1 x Smart Light Switch Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.