Tuya Programmable Wifi Smart Thermostat with 3 Type for Choose: Water Heating Thermostat (GA), Electric Heating Thermostat (GB) and Water/Gas Boiler Heating Thermostat. What we can do? Auto/Manual Temperature Setting, Programming (5+2 / 6+1 / 7days), Temperature Correction Function, Power Off Memory Function and Kid Lock Fuction; All above support Tuya App Remote Control and Compatible with Amazon Alexa and Google Assistant. Specification: Material: ABS + PC Color: White Screen: 3.2in LCD Screen with Backlit Power Supply: AC 95-240V, 50/60HZ Current load: MAX 16A (GB)/3A (GA / GC) Temperature Range: 0-90 Accuracy: 1 Application: Electric Heating Thermostat (GB)/ Water Heating Thermostat(GA)/ Gas Boiler Thermostat(GC) (optional) Item Size: 86 * 86 * 45mm Model Definition: [V71GA]: Water Heating 3A [V71GB]: Electric Heating 16A [V71GC]: Water/Gas Boiler 3A [V71GA]: Water Heating Wifi Voice Contorl 3A [V71GB]: Electric Heating Wifi Voice Control 16A [V71GC]: Water/Gas Boiler Wifi Voice Control 3A Packing List: 1 * GC Electric Heating Wifi Smart Thermostat 1 * User Manual 2 * Screw