User manual instruction guide for BLUETOOTH Headset 8B012BT SHENZHEN TEKSUN TECHNOLOGY CO.,LTD. Setup instructions, pairing guide, and how to reset. View the User Manual for the SHENZHEN TEKSUN TECHNOLOGY model 8B012BT BLUETOOTH Headset 2ADXM8B012BT. View the PDF file for free. No joining required. SOURCE: User manual of bluetooth headset H200. Press and hold down the button on the front of the bluetooth (has little phone symbol).