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