Features: 1. Support BT wireless transmission. 2. Adopt a preferred audio decoding chip, let you experience beautiful sound quality. 3. Unique waterproof function design, can be used in the bathroom, beach, swimming pool, enjoy relaxed and wonderful while relaxing. Specification: Working hours: about 3 hours Signal-to-noise ratio: more than 85db Frequency response: 100HZ-20KHZ Frequency: 2.4GHZ Size:86 x 86 x 54.5mm Material: Plastic colour: black Package Contents: 1 x Bluetooth Speaker 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.