Specifications<br />General<br />	 Model  : 509C                                                  <br />                        Color : Blue                                                  <br />                        Wearing type : Headband                                                  <br />                        Feature: Foldable， FM Radio， Recharge Li Battery， MP3 Format Music， Audio Cable with Microphone                                                  <br />                        Function : MP3 player， Song switching， Voice control， FM function                                                	<br />Specification<br />	 Connectivity : Wireless                                                  <br />                        Connecting interface : 3.5mm， USB                                                  <br />                        Compatibility: Smartphone， Tablet PC， Laptop， PC， Music Player                                                  <br />                        Plug interface: Full-sized                                                  <br />                        Driver unit: 40mm                                                  <br />                        Impedance : 32ohms                                                  <br />                        Sensitivity : 106 dB                                                  <br />                        Power supply: 320mAh lithium battery                                                  <br />                        Input power: DC 5V                                                  <br />                        Working time: 10 hours                                                	<br />Extended Function <br />	 FM radio: Yes                                                  <br />                        External memory: SD card                                                  <br />                        Max. of External memory: 16GB                                                	<br />Dimension and Weight<br />	 Product weight  : 0.122 kg                                                  <br />                        Package weight  : 0.350 kg                                                  <br />                        Product size (L x W x H) : 25.0 x 19.0 x 5.0 cm / 9.8 x 7.5 x 2.0 inches                                                  <br />                        Package size (L x W x H) : 19.0 x 13.0 x 9.0 cm                                                	<br />Package contents<br />	 Package contents: 1 x Headphone， 1 x USB Cable， 1 x Audio Cable， 1 x User Manual                                                	<br /><br /><br /><br />                                                <br />