Features: Single ear-hook headphones - compact and more comfortable. Adopt the latest concept ergonomic design, completely suitable for the auricle, very light, long time use will not feel uncomfortable. The speaker unit is located outside the ear, which helps you pay attention to the external environment when listening to music. Wear comfortably, you can choose to wear it by your right or left ear freely. Compatible for iOS/Android/WP system, as long as the device has Bluetooth, you can use. Adopting CVC6.0 + DSP processing dual noise reduction technology to improve the sound quality, to ensure that the voice is clear. Built-in high-performance lithium battery, 4 hours continuous play music, 4 hours continuous talk, 1.5 hours rapid charging. And has the integration key, the voice prompt, the electric quantity display and so on function. Suitable for cycling, running, driving, and provide portable for business and work. Specifications:Material: ABSColor: Blue, Red(optional)Bluetooth Version: 4.2Working Distance: 10m/32.81ftBluetooth configuration file: HSP1.2, HFP1.6, A2DP1.3, AVRCP1.5, D11.3Playing Time: Up To 4hCalling Time: Up To 4hStandby Time: 160h MaxCharging Time: Approx. 1.5hBattery Capacity: 75mAhWireless Frequency: 2.4GHzPackage list:1 x Bluetooth4.2 Earphone1 x Instructions1 x Charging Cable