Main Features‎:‎ ● Bluetooth V4.0 HiFi music headphones‎,‎ the transmission range up to 10m‎.‎● Lightweight and fashion‎,‎ three‎-dimensional keys design‎.‎● CVC 6.0 noise reduction technology‎.‎● Pairing two phones at the same time‎.‎● Built‎-in noise reduction mic‎,‎ to provide clear music and calls‎.‎● 500mAh Li‎-ion battery‎,‎ 12 hours music time‎.‎● Adjust head beam according to your size‎.‎ Function‎:‎ Answering Phone‎,‎Bluetooth‎,‎HiFi‎,‎Microphone‎,‎Noise Cancelling‎,‎Song Switching Connectivity ‎:‎ Wireless Application‎:‎ Computer‎,‎DJ‎,‎For iPod‎,‎Mobile phone‎,‎Portable Media Player‎,‎Sport Driver unit‎:‎ 40mm Sound channel‎:‎ Two‎-channel ‎(‎stereo‎)‎ Frequency response‎:‎ 8Hz ‎- 22KHz Impedance‎:‎ 32ohms Sensitivity‎:‎ 100 ± 3 dB Talk time‎:‎ 13H Music Time‎:‎ 12H Charging Time ‎(‎h‎)‎‎:‎ 3H Bluetooth‎:‎ Yes Bluetooth version‎:‎ V4.1 Battery Capacity‎(‎mAh‎)‎‎:‎ 500 Package weight‎:‎ 0.602 kg Product size ‎(‎L x W x H‎)‎‎:‎ 17.00 x 17.00 x 5.00 cm / 6.69 x 6.69 x 1.97 inches Package size ‎(‎L x W x H‎)‎‎:‎ 23.00 x 22.00 x 5.50 cm / 9.06 x 8.66 x 2.17 inches Package Contents‎:‎ 1 x Headphones‎,‎ 1 x Bag‎,‎ 1 x USB Cable