Features: This product is a bluetooth device which integrates the functions of receiving and transmitting into one. With an in-built rechargeable battery as well as a long stand-by time, the product is gracefully shaped and easily operated, and can freely transmit and receive all the audio signals. The music stored in the cellphone can be transmitted to the home audio system. More easily, it enables the CD player or any other audio devices to send music to the loudspeaker box or headset which has bluetooth. The on-line games can also be played on this product, and the television and film sound as well as live music can be transmitted by this product.Specification: Brand new Bluetooth V3.0+EDR Supported by bluetooth protocol: A2DP and AVRCP Effective distance: a barrier-free 10-meter distance Working hours under the TX mode: As long as 7 hours Working hours under the RX mode: As long as 7 hours Stand-by time: As long as 400 hours Charging time: 2 hours Input voltage while charging: DC 5V Battery: 300mAh rechargeable lithium batteryParing procedures: Plug the 3.5mm audio cable into the audio jack, and connect the other end (or 2*RCA) to the output jack of the audio source. (such as IPod, TV and MP3, etc.) Make sure that the mode switch is toggled to the TX mode. The distance between the product and the bluetooth receiver shall be less than 10 meters. Start up the bluetooth receiver and set it under the pairing mode. The slow flashing of one blue light after the startup signifies that the product has entered the reconnecting mode under which the bluetooth devices connected up previously will get connected automatically. If there is no re-connection 10 seconds after the startup, the two blue lights will flash fast and alternately, and the product will operate under the search state to search new bluetooth devices. If one blue light is permanently on, it indicates that one device has been connected. The flashing of the other blue light shows that the second device is being searched. If the connection to the second device fails 20 seconds later, it will stop searching, and the blue light will stop flashing. Press the reset key gently to enter into the search mode if you want to re-search the second device. Both blue lights are permanently on after the product has successfully paired with two devices.Package included: 1pc x bluetooth transceiver 1pc x 3.5mm audio cable 1pc x USB charging cable 1pc x English user manualNote: The search mode will last for 20 seconds. If no device is paired with the product within 20 seconds, it will enter into the stand-by mode which will last 5 minutes, and will automatically shut down when the stand-by mode terminates. The device will try inputting 0000, 1111, 8888 and 1234 by itself to make pairing if the pairing password inputting is necessary. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.