... thermostat( digital thermostat, programmable thermostat, radiator thermostat, thermostat controller)FeaturesRadio frequency 433MHz, one-to-one or many-to-one, a variety ... battery indicatorTechnical DataPower supply:DC3V, 2 section of 5# batteriesWireless Frequency: 433MHzMeasuring range: 0…95CelsiusSetting range: 5…90CelsiusSwitching differential: 0.5 ...