Features: Great audio effect: 66mm large diameter loudspeaker is used to ensure full bass. 16 cores horn technology, wide frequency response, ensure the high reduction of the original sound. Optimum cavity volume and fully enclosed cavity design for achieving the best sound effect. The frequency response is 200HZ-20000HZ, providing full low frequency and clear high frequency. 6 groups of sound-assisted sleeping scenes, each scene has 5 tracks to switch, 30 soothing sounds, suitable for different groups of people. Smart memory: Remember the music of last boot. Infinite loop playback, three kinds of timing, to meet the different users of the timing requirements. Node-free playback to avoid sleep-aiding problems caused by breakpoints. Headphone output selection, sharing or individual mode to switch. Anti-skip bottom shell design, all-round anti-skid foot pad. Portable size and light weight are ideal for travel use. Specification: Item Type: Sleep Sound Machine Color: As Pictures Shown Material: ABS; ; Output Power: 5V/500mA Size: 11.5 * 11.5 * 6 cm / 4.5 * 4.5 * 2.4 inch Package Weight: Approx. 438 g Package Include: 1 * Main Machine 1 * USB Cable 1 * Manual