Features 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. specificationItem Type: Bluetooth Transmitter Receiver_x000D_ Material: ABS_x000D_ Bluetooth: 5.1_x000D_ Bluetooth Protocol: A2DP AVRCP_x000D_ Wireless Distance: About 10m/32.8ft_x000D_ TX Transmit Mode: USB or 3.5mm Stereo Interface_x000D_ RX Receiving Mode: 3.5mm Stereo Interface_x000D_ Applicable Devices: Computers, for Android System, for IOS System Cell Phones, Tablets and Other Bluetooth Devices, As Well as sound Equipment with Sound Input Interface PackageList1 x Transceiver 1 x 3.5mm Cable 1 x Instruction Manual