This sound therapy relaxation system lets the body and mind unwind with 10 different settings - Rainfall, Ocean Waves, Summer Night, Waterfall, White Noise, Running Stream, Heartbeat, Tropical Forest, Songbirds and Thunderstorm. Optional 60 minute timer, on/off button and volume control. Three inch speaker for realistic sound quality. Battery option with AC adapter included. Lifetime warranty against manufacturer's defects. This item is only available online. .