Better User Experience: More precise equipment selection, faster volume calibration, more convenient song switching, and safer call answering. Multi-Device Interconnection: The Bluetooth adapter enables interconnection between multiple audio devices, greatly expanding the device's range of use. Easy to Use: In transmitter mode, the Bluetooth adapter can search and display 8 nearby Bluetooth devices for you to connect to. Built-in Antenna: Supports 10-meter long-distance lossless transmission, ensuring no dead-angle connection in living rooms and meeting rooms. Display Design: The Bluetooth name is displayed on the screen, allowing you to select and view it freely without incorrect connections. Item Type: Bluetooth Adapter Material: ABS Bluetooth Version: 5.1 Supported Bluetooth Protocols: A2DP and AVRCP Power Supply Input Voltage: USB DC 5V Microphone Sensitivity: -42dB Input/Output Connection Mode: Transmitter Mode: USB or 3.5mm stereo interface Receiver Mode: 3.5mm stereo interface Compatibility: Desktop computers, Android systems, iOS system mobile phones, tablets, and other Bluetooth devices and audio equipment with audio input interfaces.