Our speakers adopts V3 technology for easy pairing, audio input function to provide you rich playing experience. Built-in rechargeable lithium battery enables convenient charging by USB cable. Using this music box to deliver clear and crisp super bass sound, it’s an outdoor and indoor music player for you and your family, friends to enjoy music Feature - Color: Black. - Material: Aluminium alloy - Size: 7 x 7 x 4.8cm. - Charging type: USB - Battery capacity: 350mah - Signal to noise ratio: >70db. - : 3.0. - 3.0 version. Compatible with smartphones, , Tablets, , MP3, MP4, PC, Notebook, Laptop and any other audio devices with . - Metal construction. Sturdy and structure, smooth and comfortable touch, elegant and stylish appearance. Anti-slip mat design for great absorbtion and resistance. - Luxurious surround stereo bass sound. High fidelity speaker ensures 3d surround stereo and super bass sound effects. - Take crystal clear calls from your speaker with the touch of the play button, you t worry about that you will miss . - Warm Tip: Dear buyer, Due to lighting effect,monitor’s brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand! Thank you! Package list: 1 x Wireless Speaker