Bluetooth Transmitter Receiver1. Transmitter (TX) Mode: Transmit audio from non-Bluetooth audio sources (TV, PC, CD player, etc.) to Bluetooth headphones/speaker via 3.5mm audio cable. 2. Receiver (RX) Mode: Transmit audio from Bluetooth audio sources (smartphones, tablets) to non-Bluetooth headphones/speakers/cars/audio systems via 3.5mm audio cables.Easy to UseTwo-in-one design bluetooth adapter combines bluetooth audio transmitter and receiver with 3.5mm aux jack in one. Long press the left and right function keys to switch modes, which is simple and convenient to operate, suitable for a variety of devices. Without any drivers, plug and play, Bluetooth fast connection, more convenient to use.Bluetooth 5.0By connecting the adapter to non-Bluetooth devices, wireless connection with various Bluetooth devices can be established . Bluetooth 5.0 chip ensures strong signal transmission, low latency, high sound quality, high fidelity chip, stable transmission without jams and maximum connection range of 10m (without obstacles).Built-in AEC noise reduction and ANC noise reduction circuit to restore pure sound quality.USB Power SupplyUSB has power supply function. When in use, it is powered by a power device with a USB port (such as an AC adapter, car charger, laptop). As long as the Bluetooth audio adapter is plugged in, you don't have to worry about power failure while using it.