2-Wire Battery Thermostat for Gas Boilers, Manual Wall Environment Thermostat

Requires only two 1.5 V batteries (AA type). The relay uses a dry contact switch. Suitable for two-wire thermostats. This thermostat is compatible with gas boilers with dry contacts. It can be used in two ways: with batteries and via USB. For battery power, 3 x AA batteries are required (not included in the product); for USB power, simply plug it into the product (C cable is included in the product). The backlight automatically turns on during thermostat setting and turns off after 10 seconds of inactivity, effectively reducing battery consumption and extending battery replacement intervals. This prevents the brightness of the screen from disturbing sleep during the night. Program functions, child lock, power off memory, antifreeze, temperature compensation, temperature hysteresis and factory configuration. With an adjustable temperature range of 5 °C to 60 °C, this smart chronological thermostat for boilers offers reliable functions that you will like: heating/cooling mode selection, temperature calibration, restart function, etc. If you do not want other people to change the screen settings, you can lock the thermostat.