Item Details?┫ Brand new and high quality?┫ Bluetooth version: Bluetooth v4.0 + EDR?┫ Bluetooth distance: 10 meters barrier?┫ Weight about 8.5g?┫ Support talk time: about 4 hours; The standby time is about 3-4 days?┫ Compatible For Almost All The Mobile Phones And Tablet PC、 etc.?┫ Long battery life、 fast charging.?┫ Supports Two Mobile Phones Simultaneously Connected.?┫ Allows you to conveniently answer calls while driving.?┫ Compact、 ultra Light Design Stereo Bluetooth Headset、 Portable And Easy To Carry. Instruction:1.Please fully charge the headset before using.2. Restart your phone.3. Turn on the headset 、Please long press and hold MFB button for 5 or 6 seconds until the light starts flashing an alternating red-blue.(this is the key step)4.Then turn on Bluetooth on your phone、 search and connected it with the ear piece Package Include:1 x Bluetooth Earphone (Not 1 Pair)1 x USB cable