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