[ Ultra Mini Size DIY Light Switch Module ] -39X39X19mm ultra mini size body,compatible with 95% of installation box on market. [ APP Remote Control ] -Download smart life /Tuya smart APP on your phone&Tablet to control the light switch anywhere/anytime. [ Hand Free Voice Control ] -Compatible with ,google home ,a simply to voice control the light switch. [ Timer,Schedule&Count Down Function ] -You can create schedule according to your personal requirement ,as well as timing and count down,smart and DIY your to the maximum extend. [ Easy to Install ] -Mini size switch module can be installed in switch installation box or on the lamp .(Notice: please turn off electricity during installation). [ Dual Way Control ] -Can fully upgrade 2 way control switch without change wiring design of house. [ 3 Switch Type for Option ] -Rocker switch flip to change state/state synchronous and self reset switch. [ Status Memory Function ] -switch status when power off and recovery can be set to on,off and keep the same as before power off. [ Interlock Function ] -Enable only one channel on,and other channel off at the same time. [ Group-Control Function ] -Multi switch in different room can set in a group ,realize group control function. [ Family Share Function ] -You can share the switch to your family with the limited right,create a smart home together with your family member. [ Linkage Function ] -It can linkage with other switch module ,sensor and appliance in your home ,make create different scene possible,such as sleeping mode,working mode,dinner mode ,back home mode . Product type :4 Gang WIFI Switch Module Voltage:AC100-240V 50/60Hz Max. load :LED 250W 10A Operation Frequency: 2.412GHz-2.484GHz Operation temp. :-10 + 40 Protocol :WIFI IEEE 802.11b/g Operation Range Less than 100m Dimension (WxDxH) :39x39x19 mm IP Rating :IP20 Colour:White Material:plastic Package Contents: 1 x WiFi switch 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.