Baby Soothing Sleep Sound Machine

6 white noise soothing sound                            （Auto power-off after 30 mins）
Sound sensor, activate the soothing sound automatically turn on when baby cry              Rotate control the volume and sound Each sound play 30mins then in sleep mode
Built-in DC3.7V, 1800mA rechargeable Li-ion battery
8Ω 3W φ40mm speaker 1.2m                    
1.2m USB cable