[Wifi+Bluetooth Dual Mode] Connect to the network faster. The connection speed is 2 times faster than only Wifi (WIfi models have this function, zigbee does not have this function) [40A] It can be used for water heaters, air conditioners and other high-power equipment. Note the maximum power. [Requires zero line] Need to have a zero line before it can be used, high-power products are safer and more stable [Offline function] When the device is offline, the APP will remind the device to be offline after 30 minutes [APP remote control] Control the switch anytime, anywhere through the mobile APP [Voice Control] Use with for Amazon Echo and Google Home, Tmall Genie [Set Timing] Turn on and off the connected device at the specified time. Schedule the living room fan to turn on in the morning, or schedule your children's lights to turn off to let them know it's time for bed. [3 kinds of restart status] default on or off, or memory status [Backlight option] You can set the status of the backlight to ensure that switching on and off the light during rest will not affect the rest (WIfi models have this function, zigbee does not have this function) [Family Sharing Function] Create a smart home with your family [Sharing function] Share with family members for common control [Group function] You can turn off or turn on group devices together, which is more convenient. EU Product size:86 x 86x 35mm WiFi standard:2.4GHZ 802.11b/g/n Panel material:tempered glass Rated current:40A Input voltage:AC220v, 50/60hz Colour:Black/White Material:ABS Package Contents: 1 * water heater 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.