Product name: Bluetooth speaker Product size: 138x55x123mm Bluetooth Version: 5.3(EDR) Implementation standard: GB4943.1-2022 Input parameter: 5V-1A(max) Product power: 4Ω5W Product weight: 353g Battery capacity: 2000mAh Function name: Operation mode and status On/Off: Press and hold the on key Audio source: Bluetooth /TF card /AUX Audio source switching: Click the mode key to switch Previous: Click the minus key Next: Click the plus key To increase volume: Press and hold the plus key Reduce volume: Long press the minus key White Noise: Click the mode key to switch to white noise mode, and click the plus or minus key to switch to white noise music Background: Long press the mode key to switch the background pattern. By default, the background of the last switch is remembered. Colour: A black Material:ABS Package Contents: 1 * Bluetooth speaker 1 * data 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.