Power Sensor Easy Plug & Play setup for immediate use with Room Alert environment monitors. Real-time recognition: Main Power On/Off. Power supply: 5VDC 1A Adapter (included). Compatible w/ Room Alert 32W, 32E, 26W, 26WO, 24E, 12E, 11E, 7E, 4E, 3E & 3W; WiSH & WiSPR hubs. Sensor cable length & type: 25' 2-wire (included, extend to maximum 900').