Nice-looking&nice-listening , make your life enjoy good sound The bottom with silicone anti-skid , to prevent secondary noise caused by surging bass vibration Innovative volume knob design,from complex to simple , the trouble,of long-press adjustment , adjust the volume,more freely Adopted bass large diaphragm speakers,combine to create three-dimensional and powerful bass , enjoy the passionate sound Support bluetooth connection & TF card play Connection : Bluetooth connection Interface type: USB Battery capacity: 2800 Frequency response range: 40Hz-20KHz Output power: 5V/2A Signal to noise ratio: equal 75dB Power supply mode: external replaceable battery Channel: 2.1 Play time: 48 hours Extended storage: not supported Bluetooth protocol: 5.0 Effective distance: 10 meters Function: insert card, radio, voice prompt, temperature display, alarm clock reminder, Bluetooth speaker Operation mode: button Play format: MP3, Bluetooth, card Whether to support APP: No Support format: Bluetooth connection Speaker adjustment : button Product weight: 0.35 (KG) size:14.2x4.5x6cm Material:plastic colour:White Package Contents: 1 x Bluetooth Speaker Only the above package content, other products are not included. Note: Light 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.