Feature:●ReceiverThis bluetooth receiver is designed for car or home stereo. Simply connect with your wired headphones,speaker or car stereo via 3.5mm cable, and pair it with bluetooth-enabled audio sources such as your smartphone, tablet or laptop.●TransmitterThis transmitter helps transmit stereo audio wirelessly from your non-bluetooth audio sources such as TV, MP3,CD player, PC, Kindle Fire to your bluetooth-enabled headphones. Then you can enjoy high-quality private entertainment without disturbing others.●Easy usingOne-button switch to shift between the transmitter ( TX ) and receiver ( RX ) mode.●Long runtimeBuilt-in a 400mAh battery, the transmitter works up to 8h after 2h full charging.● Lightweight and small size for easy carryingSpecification:Brand: KELIMAMode: TX7Working Voltage: DC 5Vbluetooth version: V3.0Effective range: 10mFrequency: 2.4 MHzSupport A2DP / AVRCP protocolCharging time: 2hWorking time: 8hBattery: 400mAH rechargeable Li-ion batteryPackage Included:1 X bluetooth Transmitter Receiver1 X USB Cable1 X 3.5mm Audio Cable1 X 2-in-1 Audio Cable1 X User Manual