DescriptionBroad Compatibility: widely be used on your computer, laptop, home stereo system, headphone, smartphone, Mp3 player, CD player, etc.RX Mode Pairing1.Turn on the device. Blue light flashes quickly.2.Then turn on the phone BT setting and search for BT device to select and pair connections.3.Insert the 3.5mm audio into the RX port to connect the transmitter and reciever device.4. You can enjoy the wonderful music. TX Mode Pairing1. Turn on the device.2. Then turn on the receiver device (BT speaker, BT headset and other BT enabled audio system ) and wait a few seconds. The device will connect with the BT transmitter automatically.3. Then insert the 3.5mm cable into the TX port and your transmitter device (MB, TV, PC, MP3/MP4 those don?t have the BT function).4. Finally, you can enjoy the music.The indication light1. the red light don't flash when you charger.2. the red/blue light flash quickly when the device is on transmitter/receiver modern and don't pair successfully. the red/blue light flash slowly means pair successfully.SpecificationsModel: B10STechnologies: BT4.2, A2DP, AVRCP (receiver mode only)Operation Range: Up to 10m / 33ft (without any blocking objects)Charging Time: 2 hoursContinuous Use Time: 6 hours (Receiver Mode) / 5 hours (Transmitter Mode)Battery Type: Li-Polymer (200mAh)Dimensions: 44 × 44 × 12mmWeight: 18g Package Content1x BT 4.2 Audio Transmitter/Receiver Adapter1x Micro USB Power Cable1x RCA Cable1x 3.5mm Aux Cable1x User Manual