Soothe your little one to sleep witih the Homedics SoundSpa On-The-Go. Whether you are at home or away, the integrated clip can be attached to a stroller, cot or play area, bringing comfort to your little one. It features 4 soothing sounds, which include:Heartbeat,White Noise,Summer Night,Lullaby Portable and battery operated. Clip it & go, perfect for stroller, nappy bag, portable cot and more. This also features an auto-off timer.