Specification: Item Type: Headset Material: Plastic Weight: Approx. 404g/14.3oz Battery: Polymer Battery 400mah (Shipped With Battery) Bluetooth Version: 5.0 Bluetooth Distance: 15M/49.2ft Speaker Diameter: 40MM/1.6in Speaker Output Power: 10mw Use Time: Led light is on for about 7 hours, Led light is off for about 12 hours Instructions: 1. Press and hold the power button for more than three seconds, the device will start and automatically enter the bluetooth mode. 2. Mobile phone connection Step 1. In the phone settings, turn on the bluetooth settings switch of the phone, and click scan to find the device. Step 2. When the available device displays the character "bk1", it means that the mobile phone has found the bluetooth headset, click "bk1" to enter the pairing mode (if some devices require a password, please enter "0000") the third step, after the mobile phone is successfully paired with the headset, there will be a voice prompt that it is connected. 3. Light mode: press the "+" and " " buttons at the same time after powering on, the led light will start to flash, and the light will be turned off after repeated operations. Package List: 1 x Headphone 1 x Audio Cable 1 x Charging Cable 1 x User Manual