Product description Wireless thermostat for heating or cooling units Green backlit display Optional cooling and heating Temperature display in C or F Target temperature display C or F Toggle Celsius/Fahrenheit < p> Set the target temperature at any time Automatically turn on/off heating or cooling equipment to save on electricity bills. On/Off function Remote Shutdown Auto Setup Code Low Battery Warning Low Temperature/High Temperature Alarm Settings of memory Product parameters: OTS100, temperature remote control: Transmit frequency: 433.92 MHz Current temperature. Range: 0C~70C or 32F~158F Target temperature. Range: 0C~70C or 32F~158F Temperature resolution: 1C or 1F Each press of the left/right button: 1C or 1F 2 x 1.5V AAA batteries Wall mount and table stand Green backlight Optional heating and cooling modes OPS100, plug-in socket: Voltage: 230 V/50 Hz, 120 V /60 Hz Maximum power: 3680 W, 16 A Maximum range: 20 meters in open spaces