Please Note:1. Using a power supply that exceeds 5V may damage your device;2. Our sleep sound machine does not have a built-in battery, only supports the power adapter included for using;3. When power on, press and hold the power button for 5 seconds to restore the device to factory settings if you want or something goes wrong.SpecificationsNumber of Soundtracks: 30Equalizer Modes: Standard/Pop/Rock/Jazz/ClassicNight-Light: Ring + Ambient Light (7 colors)Button Type: Full touch + Light transmissionVolume level: 32Shutdown Memory: YesTimer Functions (min): 15, 30, 60, 90, 120, OFFBuilt-in Battery: NoPower Adapter: DC5V /1A, 1.5-metersHeadphone Jack: 3.5mmWeight: 8.8 ounces (0.25kg)Dimensions: 4 x 4 x 2 inches (101 x 101 x 51mm)Package Contents:1x Sleep Sound Machine1x Power Adapter1x User manual

Letsfit White Noise Machine with 7-Color Night Lights, 30 High Fidelity Soundtracks, Full Touch Metal Grille and Buttons, Timer and Memory Features, Portable Sound Machine for Home, Nur