Feature:1. 2 in 1: Turn old wired devices into BT smart devices in seconds, switch dual signals at will, receive (RX) and transmit (TX) as one, suitable for multiple devices.2. Transmitter Mode: Wirelessly transmit sound from a non BT TV, home stereo system or CD player to a BT headset or speaker.3. Receiver Mode: Wirelessly transmit sound from a BT enabled mobile phone, tablet or computer to a wired stereo, speaker or headset.4. BT 5.0 Stable Output: To achieve a high degree of restoration of high quality music, while the signal is not easy to disconnect in a complex interference environment.5. Built In Battery: The BT 5.0 transmitter receiver has a built in 200mAh large capacity rechargeable lithium battery, which can be used while charging.6. Scope of Application: Compatible with most BT protocol products on the market, widely used in computers, laptops, tablets, home stereo systems, earphones, smart phones, MP3 players and CD players, etc.Specification:Item Type: BT 5.0 Transmitter ReceiverModel: RX-TX-19Material: ABSColour: BlackBattery Type: Built In 200mAh Lithium Battery (Included)BT Version: V5.0+EDRTechnology: BT5.0, AVRCP (Receiver Mode Only), A2DPBT Normal Distance Range: Approx. 15m/49.2ft (Without Obstacles)Response Frequency Range: 10Hz-20KHzInterface: Stereo Analog AUX3.5mmPerformance: HiFi LevelPairing Name (Receiving Mode): RX-TX-19Transmitter Mode: Red LED Light is OnReceiver Mode: Blue LED Light is OnApplicable Models: Compatible with Most BT Protocol Products on the Market, Widely Used in Computers, Laptops, Tablets, Home Stereo Systems, Earphones, Smart Phones, MP3 Players and CD Players, etc..Package List:1 x BT Transmitter Receiver1 x 3.5mm Cable1 x RCA Cable1 x Data Cable1 x Manual Note:RX and TX cannot be activated at the same time, only one of the two