1、Designed to control heating system, easy to operate and program. 2、Large display screen with backlight, easy to read and touch buttons make simple operate. 3、High efficiency and energy saving thermostat to help lower home energy costs. 4、Made of flame retardant material, safe and stable for daily use. 5、5+2 six periods programmable maximize comfort and economy. Features: Designed to control heating system, easy to operate and program. Large display screen with backlight, easy to read and touch buttons make simple operate. Interlock to connect gives you easy installation. 0.5°C Accuracy keeps temperature within the level you set. 5+2 six periods programmable maximize comfort and economy. Data memory when power is off. A standard 86mm pattress box or european 60mm pattress box is suitable for installation (Box NOT Included). High efficiency and energy saving thermostat to help lower home energy costs. Made of flame retardant material, safe and stable for daily use. All setting languages synchronize your time zone, address and language. Specifications: Model: BHT-3000L Type: Thermostat for Boiler Current Load: 5A Sensor: NTC3950, 10K Display: LCD with Backlight Buttons: Capactive Touch Buttons Accuracy: ±0.5℃ or ±1℉ Set Temp. Range: 5~35℃ Display Temp. Range: 5~99℃ Ambient Temperature: 0~45 ℃ Ambient Humidity: 5~95 % RH (Non Condensing) Storage Temperature: -5~45 ℃ Power Consumption: <1.5W Timing Error: <1% Installation Box: 86 * 86mm Square or European 60mm Round Box (Not Included) Wire Terminals: wire 2 x 1.5mm² or 1 x 2.5mm² conservation Class: IP20 Shell Material: PC+ABS (Flame Retardant) Color: Black Item Size: 86 * 86 * 39mm / 3.39 * 3.39 * 1.54in 1 * Thermostat 2 * Screws 1 * User Manual(English)