Features: Music playback function: 10pcs music that help you go to sleep easily and improve your sleep quality. It includes white noise, pink noise, soothing music, quite music, wave, warble, thunderstorm sound, campfire, ripple, chirp. DIY recorder function enables you to your own DIY voice or song for up to 5 minutes. With timer function, you can set a time for sleeping and the machine will shut down automatically after the set time is reached. With night lamp design, just hit the lamp top gently, it would illuminate soft light to drive darkness away. Powered by 4 * AA battery or USB plug in , very convenient to use . Equipped with 3.5mm earphone jack, you can use this machine with earphone to avoid affecting other people. Reasonable function settings make it more convenient and practical to use. Its design is based on acoustics principle, which can make you place yourself in the music environment and release pressure, relax mood to improve sleep quality. Specification: Condition: 100% Brand New Item Type: White Noise Machine Material: ABS Input voltage: 4.5V Rated Power: 5V DC Power: 3W Light Color: Support warm light and cool light Built-in Music: 10pcs (white noise, pink noise, soothing music, quite music, wave, warble, thunderstorm sound, campfire, ripple, chirp) Timer: 30min/60min/90min Power supply: USB Plug in or 4 * AA battery (not included) Headphone jack: 3.5mm Size: approx. 80 * 130mm / 3.15 * 5.12in Weight: approx. 410g Package List: 1 * White Noise Sound Machine 1 * Manual 1 * USB Cable