Certification: CE FCC ROHS
1.Charging: 4-AA batteries self-contained or connect the computer directly to the USB cable
2. Voltage: 5VDC 300mA
3. Rated power: 1.5W
Product Content:
1. 9 types of white noises: rain, sea water, thunder, wind, flowing water, light music, guqin, sounds of nature , prenatal music
2. Automatic timing selection: 15, 30, 60 minutes
3. Volume control knob
4. Lightweight and portable