Feature:1. TWO WAY TRANSMISSION: This bluetooth sound 2 in 1 receiver transmitter can not only be used as a receiver to receive Bluetooth sound, but also can be used as a transmitter to send the sound to other Bluetooth devices, which realizes the two way transmission of sound.2. STABLE BLUETOOTH 5.1 TECHNOLOGY: The 2 in 1 bluetooth 5.1 receiver transmitter adopts bluetooth 5.1 technology with more stable wireless connection and lower power consumption, which can provide better sound transmission experience.3. CONVENIENT CALL FUNCTION: This Bluetooth sound 2 in 1 receiver transmitter comes with a built in microphone, which can be used to make calls via Bluetooth connection, making it convenient for users to communicate by voice at any time.4. MULTIPLE CONNECTION INTERFACES: TX transmitter mode supports USB and 3.5mm stereo interface, RX receiver mode supports 3.5mm stereo interface, which is convenient for users to connect according to the interface requirements of different devices.5. SUITABLE FOR A VARIETY OF DEVICES: This device is suitable for computers, cell phones for Android and for iOS, tablets and other Bluetooth devices, as well as sound devices with sound input interface, to meet the needs of a variety of devices to connect.Specification:Item Type: Bluetooth Transmitter ReceiverMaterial: ABSBluetooth: 5.1Bluetooth Protocol: A2DP AVRCPWireless Distance: About 10m/32.8ftTX Transmit Mode: USB or 3.5mm Stereo InterfaceRX Receiving Mode: 3.5mm Stereo InterfaceApplicable Devices: Computers, for Android System, for IOS System Cell Phones, Tablets and Other Bluetooth Devices, As Well as sound Equipment with Sound Input Interface.Package List:1 x Transceiver 1 x 3.5mm Cable 1 x Instruction Manual