Overviews:Do you still bear the problem of playing music with your Mobile phones the sound is not enough bigger? Do you still bear some beautiful speakers with poor quality and short standby time? Do you still bear some only single function speakers? This S28 Portable Mini Metal Bluetooth Speakers， which has Bluetooth， TF card， radio， audio playing， hands-free calls and so on functions. It is simple and easy to use due to its more human design. The international advanced decoding chip which offers you the best sound quality， so is the first choice for listening to music or watching movies. With Hands-free phone function， release your hands， just touch the answer key， that you can easily enjoy high-definition voice， and will not affect driving. Ultra low power output， long time battery use， meet your daily requirements， which allows you to listen music on the go. Strong functions speaker just need low price， you worth it!Brand: N/AModel: S28Colour: BlackMaterial: MetalQuantity: 1Output Power: 3WSpeaker Unit: 43mm dual voice coil speaker + Low frequency amplifierStorage Type: Supports TF card up to 16G(max)Battery Capacity: 500mA lithium battery£¨built-in£©Supported Formats: MP3USB Size: USB2.0 compatible USB1.1Wireless Connection: Bluetooth 3.0 + EDRSmart Connect: Smart Bluetooth connectivity Radio function: YesBluetooth Distance: 10MRated Impedance: 4ohmFrequency response: 280Hz-16KHzSignal to noise: 95dBDistortion: 0.5%Battery Charging Voltage: 5VBattery Charger Time: 2 hour Product Feature:1. S28 Wireless Bluetooth Speaker Support Answer Calling and TF Card2. Support TF card(micro SD TF card)with TF card slot，can play MP3 format files in the TF card3. Support Mobile Phone/Laptop/Tablet PC4. Expanded Bass Xpansion system drives a fuller richer low-end response5. Larger 45mm driver delivers precise highs for superb sound6. Built in rechargeable battery，charged by computer via USB interface. 7. Compatible with : For iPad / For iPad2 /For New iPad /For iPad Mini. For iPhone4/4s/5 For Samsung / Xiaomi /HTC And more phone Packing List:1 x Mini Bluetooth Speakers1 x Audio and USB charging cable (46cm)