Product Parameter: Bluetooth version: V5.0, Bluetooth device name: Natural Sound Speaker mission distance: 10 meters, Built-in lithium battery: 3.7V or 1800MAH Signal-to-noise ratio: 75dB, Output power: 2 x 5W Power input: DC5V or 2A, Frequency response range: 100Hz-20kHz Distortion: ≤10, Product size: 180x85x75mm Color: White Material: plastic Package Contents: 1 x White Noise Machine 1 x USB Cable 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.