How to Use: 1. Pairing The first time the headset is paired with BT, hold the power button for 3 seconds to enter the BT pairing mode, until you hear the second voice prompt ("power on, pairing'). Then release the power button and the indicator light flashes alternately in red and blue. 2. Connect Open the mobile phone BT settings, select: V9, the headset will be successfully connected within a few seconds. Specification: Item Type: Bluetooth Headset Material: Ti Alloy + TPE + PC aLloy Color: Black Main Control Chip: BK 3266 V5.0 Speaker Type: Bone conduction vibrator Frequency Response Range: 20HZ-20KHZ Built-in Battery: 180mAh, polymer lithium battery Package List: 1 x Instruction Manual 1 x Headset 1 x Charging Cable 1 x Pair of Earplug