Highly adaptive one-second connection: The RX switch in receiver mode enables fast pairing with your phone, tablet, laptop, or car stereo. In TX mode, the wireless audio adapter automatically connects to your Bluetooth headphones or speakers, allowing you to enjoy music and movies quickly. Zero-delay HD streaming: Supports AptX Low Latency and AptX HD technology to help reduce audio delay, providing synchronized audio for TV, film, and video content. With Bluetooth 5.0, high-quality audio signals are transmitted reliably to speakers or home stereo systems. Multifunctionality and NFC interface: This Bluetooth 5.0 receiver offers multiple connection options including 3.5 mm AUX, RCA, optical, and coaxial inputs. It also supports playback from U-Disk or TF card. The NFC feature allows simple pairing by tapping your compatible mobile device to initiate Bluetooth connection. Simple control and infrared remote: An LED digital display shows the devices current mode. The included infrared remote control lets you manage Bluetooth connections from a distance, ideal for listening to sports or movies without disturbance. Long-lasting performance: Built-in 500mAh battery provides up to 812 hours of use. You can charge while streaming to maintain continuous playback. Package includes: Bluetooth adapter, 3.5mm AUX cable, RCA audio cable, Type-C charging cable, user manual, and infrared remote control. Specifications: Size: 92*65*20mm Weight: 75g Operating band: 2.402GHz2.480GHz Battery: 3.7V/500mAh Charging time: 1.5 hours Usage time: Receiving (RX): 10 hours Transmitting (TX): 8 hours Charging method: Type-C Compatible devices: Android and iOS smartphones and tablets, active speakers, amplifiers, and Bluetooth speakers or headphones that support A2DP/AVRCP profiles Supported audio formats: MP3, WAV, WMA, APE, FLAC, G729, M4A, ALAC, AMR, DTS, MIDI, G726, MTY Features: Bluetooth receiver (RX) and transmitter (TX) 2-in-1 design with switch for mode selection LED digital display shows operating status and Bluetooth mode Built-in digital-to-analog chip supports optical, coaxial, AUX, RCA, U disk, and TF card inputs NFC function enables quick pairing with compatible devices Dual-color LED indicator light Infrared remote control up to 58 meters, supports signal switching, volume control, and channel selection Built-in HD microphone supports hands-free calling and voice prompts Remembers device settings including source, volume, and sound mode; auto-reconnects upon power-on Plug-and-play design, no drivers or app required Packing list: Bluetooth adapter x1 Type-C charging cable x1 3.5mm AUX audio cable x1 RCA audio cable x1 User manual x1