Tuperoymse Support BT wireless transmission. Built-in microphone allows you to enjoy hands-free calling. Adopt a preferred audio decoding chip, let you experience beautiful sound quality. Unique waterproof function design, can be used in the bathroom, beach, swimming pool, enjoy relaxed and wonderful while relaxing. Bluetooth version: 5.0 + output: 3w Transmission distance: 10 meters battery capacity: 400 mAh rated voltage: DC 5 v Charging time: 4 hours playing time: 2 hours Frequency range: 90Hz-20KHz Signal-to-noise ratio: more than 85db Colour:Black Material:plastic Size:8 x 8 x 4cm Package contents: 1 x Bluetooth Speaker 1 x Charging Cable Only the above package content, other 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. Only the above package content, other 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.