Features: 1. Built-in 20 soothing sounds 2. Support headphones listening 3. Timer function 20 to appease the sound, 4. Night bed night light function 5. Ambient light function 6. AC adapter or installation and removal of 18650 battery power supply; Product parameters Working voltage: 3.7V Power supply: input AC 100~240V<50/60Hz Output DC: 5V, 1A