This telecom thermostat is for many an kinds of heating devices and protect some home appliances. It will automatically on/off heating device as the close temperature changing, in order to maintain a unfailing room temperature. °C / °F. High/low temperature. Easy with memory function. contrabass battery. Room. RF 433 MHz RF. One distant spirit can up to 100pcs receivers. movable design, in hand/stand on table/wall mounted. : Color : colourless Receiver Plug : US US Type : 110V/15A/60Hz, 1800W Max. Transmission : 433.92 MHz Max. : 40m in Open Area on-line Temp. : 0 °C ~ 60 °C / 32 °F ~ 140 °F Target Temp. : 0 °C ~ 60 °C / 32 °F ~ 140 °F Temperature Resolution : ± 1 °C / ± 1 °F distant Control Power : 2 * AAA 1.5 V Batteries -LRB- Not Included -RRB- distant Control Size : 122 * 42 * 25 mm / 4.8 * 1.65 * 0.98 in distant Control Weight : 52g / 1.85 oz Thermostat Size : 100 * 50 * 70 mm / 3.94 * 1.97 * 2.75 in Thermostat Weight : 90g-111g / 3.18oz-3.93 oz Package Size : 15.2 * 10.2 * 6 cm / 5.98 * 4 * 2.36 in Package Weight : 186g-214g / 6.57oz-7.55 oz Package List : 1 * Wireless Thermostat 1 * distant Control 1 * User handbook -LRB- English people -RRB- .