Features: the power switch is on the bottom of the speaker box and the bottom is equipped with anti-slip mat to prevent the noise caused by low frequency vibration.The built-in high sensitivity microphone the wireless free phone call is clear TF socket audio line socket suitable for all devices with 3.5 mm audio output (computer MP3 MP4 and PSP).</br>.Basic parameters: Bluetooth 4.0 500 mA polymer battery speaker bass enhancement! Suitable for all Bluetooth devices watching movies playing games listening to music! (smart phone tablet IOS tablet and more).</br>Unique design: round wireless desktop Bluetooth speakers the screw thread surface design suitable for family office desk cabinet room bedside cabinets bookshelves yoga indoor fitness etc..</br>.Delicate and small: silver metal +ABS plastic shell small size 6 x 5cm can be put into the backpack. Exquisite gift box packaging suitable as a gift presented to family friends and children!</br>After sale:One year warranty please feel free to buy! we believe that the quality and service will give you satisfactory shopping experience! Any question please freely contact us?? we will reply within 24 hours and do our best to solve.</br></br>Product Description</br></br>Built-in MIC?? hands-free calling?? call without delay.<br> Built-in TF card slot supports MP3 music player.<br> Built-in rechargeable lithium battery?? play music up to 3H?? 500mah can be recycled charge.<br> 3W speaker with enhanced bass?? 40mm speaker driver??offers high quality sound from its tiny body<br><br> Specifications: <br> - Bluetooth Version: V4.0+EDR <br> - Working Range: Up to 33 Feet <br> - Battery Charge Time: 3 hours <br> - Dimension: 2 x 2 x