In transmitter mode, the Bluetooth adapter can be paired with a Bluetooth headset or speaker. In receiver mode, it connects to traditional wired speakers, stereo receivers, or the auxiliary input port of a car adapter, enabling wireless audio playback from a mobile phone or tablet. Features a TF card slot: Play audio from either your smart device or a TF card. Compatible with older speakers, vintage stereos, and car stereo systems via 3.5 mm or RCA cables. Bluetooth 5.0 technology: Offers improved transmission range, faster data transfer, and lower power consumption compared to earlier versions. LED display shows Bluetooth status. Press the previous/next track buttons simultaneously to switch between transmit and receive modes. Plug-and-play operation: No external drivers required. Works universally with TVs and other audio devices to enable Bluetooth streaming to headphones, or enables wireless streaming from phones and tablets to home stereos. Bluetooth specifications: Version 5.0 EDR, A2DP, HSP, AVRCP Frequency range: 2.4 GHz – 2.48 GHz Transmission distance: Up to 10 meters Reception distance: Up to 10 meters Charging voltage: DC 5V Receiving capability: Supports connection to one mobile phone Transmitting capability: Supports connection to one pair of Bluetooth headsets Display: Shows up to 8 available devices for pairing (transmit mode); displays names of paired mobile phones (receive mode) Dimensions: 69 × 69 × 23.5 mm Color: Black