SK20 Wireless Cool Skull Bone Bluetooth Earphone with Mic Noise Cancelling Hi-Fi Bass Stereo Ultra Mini Earbuds Handsfree EarpieceFeature:Bluetooth version: 4. 1+EDRErgonomically-design, not easy to fall off. Lightweight, you can barely notice it while inside your ear. Talk: 3-4 hoursChannel: StereoBuilt-in CVC6. 0 noise cancellation technology, provide you with clear hands-free calls and high fidelity music. . Compatible and stable, energy-saving, securely stay in ear when doing sport and driving. Transmission range: Accessible 10 metersCharging: 1-2 hours (red light when charging, full of blue light)Headphone size: 2. 0 * 1. 7 cmProduct Model: sk20 Bluetooth headsetBattery capacity: 65mABulit in rechargeable 65mAh battery lasts up to 4 hours music playtime and 6 hours talking time, and only need 1-2 hours for fully charging. Support IOS DEVICE POWER DISPLAY. Features: Call Pickup Reject, Music Play Pause, Music Support, Call Function, Battery DisplayEasy to charge it in car or computer with magnetic USB stick charger. Notes:1. Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. 2. Due to light and screen difference, the items color may be slightly different from pictures. Package Included:1 * USB Bluetooth headset1 * Manual1 * USB ChargingNO Retail Box. Packed Safely in Bubble Bag.