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 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.