Main Features: <br />● Taking bluetooth 2.1 + EDR technology， long transmission distance up to 10 meters<br />● Enjoy hands-free phone calls and music in the car， making your driving or trip more elegant and safer<br />● Compatible with all bluetooth enabled digital devices<br />● Built-in high capacity rechargeable Li-battery， charging by computer or other DC 5V<br />● Enable directly playing MP3 files in TF / micro SD memory card <br />● Hanging buckle design， ideal for outdoor activities， travel<br />● With FM radio function， listen to world affairs <br />● Compact size of ease for carrying anywhere<br /><br />    Specifications<br />Primary Features<br />  Model: S307                                                  <br />                        Design: Sport， Portable， Mini                                                  <br />                        Supports: TF Card Music Playing， Microphone， Bluetooth， Hands-free Calls， Volume Control                                                  <br />                        Functions: Stereo， Songs Track                                                  <br />                        Compatible With: iPod， MP4， PSP， MP5， Laptop， Mobile Phone， Tablet PC， PC， TF/Micro SD Card， iPhone， MP3                                                  <br />                        Connection: Wired， Wireless                                                  <br />                        Interface: 3.5mm Audio， TF Card Slot                                                  <br />                        Audio Source: TF/Micro SD Card， Bluetooth Enabled Devices                                                  <br />                        Color: Blue， Black， Red， Pink                                                 <br />Technical Parameters<br />  Transmission Distance: W/O obstacles 10m                                                  <br />                        Driver Unit: 40mm                                                  <br />                        Speaker Impedance: 4 ohm                                                  <br />                        Freq: 150Hz-18KHz                                                  <br />                        S/N: 80dB                                                 <br />Other Parameters<br />  Bluetooth Version: V2.1+EDR                                                  <br />                        Power Source: USB， Battery                                                  <br />                        Charging Voltage: DC 5V                                                  <br />                        Power Output: 3W                                                  <br />                        Charging Time: 2 - 3hours                                                  <br />                        Lasting Time: 3 - 5hours                                                  <br />                        Battery Capacity: 400mAh                                                  <br />                        Operating Range: 10m                                                 <br />Dimension and Weight<br />  Product Weight: 0.103 kg                                                  <br />                        Package Weight: 0.20 kg                                                  <br />                        Product Size (L x W x H): 9.4 x 8.0 x 3.6 cm / 3.7 x 3.1 x 1.4 inches                                                  <br />                        Package Size (L x W x H): 10.5 x 10.5 x 5.2 cm                                                 <br />Package Contents<br />  Package Contents: 1 x S307 Handing Wireless Bluetooth 2.1 Handsfree Phone Speaker， 1 x Buckle， 1 x USB Cable， 1 x English User Manual                                                 <br /><br /><br /><br />                                            <br /><br /><br />                                                <br />