1. Three timing functions: ON for long-term playback, 60 minutes, and 120 minutes for timed playback. 2. 14 kinds of soothing music: namely, 10 kinds of natural music (flowing water sound, seagulls, rain and thunder, bird chirping, bird singing, ocean waves, rain and thunder, cicada chirping, rain, bird singing), 2 kinds of train sounds and 2 kinds of white noise. 3. Light color: the light button for the first time and it automatically change color. it again and you can choose the light color (8 colors): white light/dark blue/green/red//Fluorescent green/light blue/breathing light. 4. Volume adjustment: The default volume upon startup is set to the , with an adjustable range of 01 to 11 levels. 5. Charging time: Approximately 3 hours. Usage time is approximately 21-22 hours (a prompt be given when the battery is low). Charging indicator lights: Charge (red), Fully (green). Safety Lock: Use the safety lock to set the required Settings to avoid accidental changes. Color:Black material: ABS Package Contents: 1 x White Noise Sound Machine 1 x USB cable 1 x English Instruction Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.