Product size: 93 * 80 * 28mm, [Parameters] Voltage input: DC5V = 0.5A, power: 1W, Battery capacity: 300mAh, use time: 23 hours, charging time: 1 hour, A total of 10 songs including sleep aid music: white noise, lullaby 1, crickets chirping, waves, clocks, birds chirping, heartbeat, lullaby 2, running water, lullaby 3 10 Sleep Sounds Without Loop -- White noise, ocean waves, birds, heartbeat, clocks, crickets, running water and 3 lullabies, this special gift with great love, will give you the utmost peace of mind, suitable for baby, children and adults. 3 Timers -- You can set it for continuous playback or set an automatic stop timer of 15.30.60 minutes. Compact Design and Memory Function - - With 9.3 x 8 x 2.8 cm, it can be easily inserted into a handbag or suitcase, perfect for home, office or travel. Not only for sleep -- white noise sounder can not only cover the noise and improve the quality of sleep, but also relax the body and mind. It is suitable for use at home, in the office, in a dormitory, in a baby room or in any place where you want to rest.