MotionSense from Moen is available in four styles and works in three ways: the Wave Sensor at the top of the faucet, the Ready Sensor near the base and the handle on the side. The easy-to-install hands-free technology reduces the spread of germs and diminishes the risk of cross-contamination. MotionSense is powered by a battery pack that utilizes six standard AA batteries or an optional AC power adapter. An LED light indicates when the faucet turns on/off or if the faucet is running low on batteries.