Lower your energy bill with the Xia Wireless Energy Saving Device. By using a pair of sensors, this device intelligently detects when someone leaves the room and turns off the air conditioner accordingly. Ideal for homes, hotels and hosts, Xia can save anywhere from 30 to 70% on your energy bill. Additionally, the two sensors include a door sensor and a ceiling-mounted sensor. The door sensor detects when someone leaves the room while the other senses whether or not there is still anyone inside. If no one is in the room for 15 minutes, Xia sends an IR signal to turn the air conditioner off. 100% wireless, Xia is easy is to set up and doesn’t need to connect to the mains electricity or the AC. Finally, the battery-powered device uses advanced battery management to prolong battery life.