Main Features:  <br />Noise canceling， isolate the noise， give you a better listening experience<br />40mm dynamic unit， provides a clear sound<br />Built-in 200mAh Li-polymer battery， for 390 hours standby time， 12 hours music time<br />Protein earmuff， very soft and comfortable， adds no burden to your ear<br />Anti-fingerprint， oil resistance<br /><br /><br />    Specifications<br />General<br />	 Brand: QCY                                                  <br />                        Model: QCY50                                                  <br />                        Color: Black，Red，White                                                  <br />                        Wearing type : Headband                                                  <br />                        Function: Answering Phone，Bluetooth，Microphone，Noise Cancelling，Song Switching，Voice control                                                	<br />Product Details<br />	 Headset type: Dynamic                                                  <br />                        Connectivity : Wireless                                                  <br />                        Connecting interface : Micro USB                                                  <br />                        Application: Mobile phone                                                  <br />                        Driver unit: 40mm                                                  <br />                        Sound channel: Two-channel (stereo)                                                  <br />                        Impedance: 32ohms                                                  <br />                        Sensitivity: 105±3 dB                                                	<br />Extended Function <br />	 FM frequency range: 87~108MHz                                                  <br />                        Bluetooth: Yes                                                  <br />                        Bluetooth version: V4.1                                                  <br />                        Bluetooth distance: W/O obstacles 20m                                                  <br />                        Bluetooth protocol: A2DP，AVRCP，HFP，HSP                                                  <br />                        Bluetooth mode: Hands free，Headset                                                	<br />Dimension and Weight<br />	 Product weight: 0.145 kg                                                  <br />                        Package weight: 0.250 kg                                                  <br />                        Product size (L x W x H): 19.00 x 16.50 x 4.00 cm / 7.48 x 6.50 x 1.57 inches                                                  <br />                        Package size (L x W x H): 25.00 x 16.00 x 5.00 cm / 9.84 x 6.30 x 1.97 inches                                                	<br />Package Contents<br />	 Package Contents: 1 x Bluetooth Headphones                                                	<br /><br /><br /><br />                                            <br /><br /><br /><br /><br /><br /><br /><br /><br />                                                <br />