1、Single ear-hook headphones - compact and more comfortable. 2、Adopt the latest concept ergonomic design, completely suitable for the auricle, very light, long time use will not feel uncomfortable. 3、The speaker unit is located outside the ear, which helps you pay attention to the external environment when listening to music. 4、Wear comfortably, you can choose to wear it by your right or left ear freely. 5、Compatible for iOS/Android/WP system, as long as the device has Bluetooth, you can use. 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 CVC 6.0 + DSP audio 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: ABS Color: Blue, Red(optional) Bluetooth Version: 4.2 Working Distance: 10m/ 32.81ft Bluetooth configuration file: HSP 1.2, HFP 1.6, A2DP 1.3, AVRCP 1.5, D 11.3 Playing Time: Up To 4h Calling Time: Up To 4h Standby Time: 160h Max Charging Time: Approx. 1.5h Battery Capacity: 75mAh Wireless Frequency: 2.4GHz Package list: 1 x Bluetooth 4.2 Earphone 1 x Instructions 1 x Charging Cable