has 20 soothing sounds that allow you to select the perfect channel and for your rest. This sound machine features night light that can emit a warm light and a of safety. The sound machine allows you to setup optional 15, 30, and 60mins automatic shut-off timer. The sound machine remembers your last of the sound and volume level when you turn it on. This white noise sound machine is small and lightweight, portable and travel use. Size: 90 x 90 x 31mm. Input voltage: DC5V. Working voltage: 3.7V. Battery capacity: 1200mah.(Built-in) Use time: 15~30 hours. Charging time: 1.5 hours. Item Type: Sleeping Monitors Model Number: White Noise Player color:White Material:plastic Package Contents: 1 x Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.