Feature: Exquisite round design with perfect process, mini body, smaller and lighter Multi-point design, one transmitter could connect with two Bluetooth devices at the same time, eg. one BT speaker and BT headsets. High quality stereo transmission makes sure you can enjoy the auditory feast. Specification: Bluetooth version: Bluetooth 4.0Transmission distance: above 10mCharge time: 1.5 hours Continuously time: 4 hoursInput: 3.5mm audio cablePower supply: Built-in lithium batteryColor: BlackWeight: 48gSize: 45x11mmPairing guide: 1. Turn on the Bluetooth device to be paired (Bluetooth headset or Bluetooth speaker), and get it ready for the pairing mode. 2. Have a long press on the power button for two seconds. 3. After the power is on, one of the blue lights flashes slowly, showing that the connection restoring mode is entered. In this mode, the Bluetooth devices connected previously will be connected automatically. 4. If the previous Bluetooth device is not reconnected after ten seconds of the startup, two blue lights will flash quickly in an alternate way, showing that the pairing mode is entered and a new Bluetooth device will be searched. 5. One of the blue lights is constantly on, showing that one device is connected. The other blue light flashes up, suggesting that the second device is being searched. If the second device has not been connected after 20s, the search will stop automatically when the blue light stops flashing. If you want to pair the second device again, you need to press the power button gently to enter the search mode. When the two devices have been connected, the two blue lights will be constantly on. Package Content: 1 x Bluetooth Transmitter1 x Charging cable 1 x 3.5mm audio cable 1 x User Manual.