Tuya WiFi Smart Water/Gas Heating Thermostat Programmable Temperature Controller Compatible with Alexa Google Home Large LCD Screeb with Backlight 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 Assistant. Features: APP REMOTE CONTROL -- Support Tuya App Remote Control Via Smart Phone.  Convenient control your home anywhere anytime. HAND-FREE VOICE CONTROL -- Compatible with Alexa and Assistant, you can command to control your home teperature, free your hands to do other things. PROFESSIONAL BOILER HEATING SYSTEM CONTROL -- Designed for water/gas boiler heating system, help you develp a economical heating method,  money saving and engergy saving. WEEKLY PROGRAMMABLE -- Supports 5+2/6+1/7 days different temperature setting according with 6 time-modes daily,  High-efficiency and energy-saving thermostat to help lower home energy costs. MEMERY & KID LOCK -- Setting can recovery even cutting electric power. With Children lock to avoid kids mis-operation. 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