Zed mimics the feeling of being in a car. His clever technology recreates soothing low-frequency vibrations that are known to send babies to sleep. Simply place Zed on the mattress by your baby’s feet and press the snooze button. The finely tuned vibrations ripple gently through the mattress, comforting your baby and encouraging a deep sleep. Zed can also be used as a portable night light - great for night-feeds and for taking on holiday. Zed produces gentle vibrations that babies and small children feel as a comforting sensation (not suitable for adult use). Zed produces gentle car-like vibrations that are known to send babies to sleep6 soothing vibration modes with 1 hour auto shutdownSafe to use from Birth - Compact size that works on any type of mattressBuilt-in night light with 3 brightness levels plus an all-night modeSplash Proof!! Up to 50 hours battery life (measured at the slowest speed) Takes 2 "AA" batteries