Wireless Digital ThermostatWireless Thermostat with Digital DisplayLarge Dial with Digital DisplayWireless Communication Between Thermostat and ReceiverElectronic Sensor for Accurate and Responsive PerformanceTPI (Time Proportional & Integral) Control for Heating EfficiencyComfort/Economy or ON/OFF ModesBattery Powered with Low Indication Status (Batteries Supplied)5°C to 30°C Set Temperature Range0.5°C and 1°C Temperature Swing Adjustment5°C Frost ProtectionTransmission frequency: 433 Mhz (80m Open Field, 30m Indoor Transmission)16A Receiver Contact Rating (Volt Free)Energy efficiency; ERP Class 4, 2% valueTechnical Specification:Power Supply: 2 x AA Batteries (Transmitter) & 240VAC, 50hz (Receiver)Operating Temperature: 0°C to 50°CCurrent Rating: 16ASwitching Differential: 1°CSet Temperature Range: 5°C to 30°CTemperature Frost Protection: 5°CTemperature Display Range: 3°C to 51°CFrost Protection: Yes; 5°CTPI (Time Proportional & Integral) Control for Heating Efficiency: YesSensor Typ