Features 1. Wireless Transmission: The Bluetooth 5.3 receiver allows wireless transmission of high-fidelity audio from any Bluetooth-enabled device, including smartphones, tablets, computers, and laptops, to any stereo system or speakers. 2. Bluetooth Receiver: Functions as a Bluetooth receiver only, adding Bluetooth capability to existing stereos, active speakers, car audio systems, home stereos, and 3.5mm wired headphones. Not a Bluetooth transmitter or amplifier. 3. NFC Function: Equipped with an upgraded NFC feature for quick and easy pairing. Simply tap your NFC-enabled mobile device to the receiver for fast connection. 4. Input and Output: Supports AUX, optical, and coaxial audio output, compatible with a wide range of devices. Accepts audio input via Bluetooth, USB, and memory card. Supports Bluetooth audio streaming, USB drive playback, and memory card playback. 5. HiFi Stereo: Built with a Bluetooth 5.3 chipset for high-quality wireless audio performance. Delivers clear, high-fidelity sound signals for music streaming to home stereo systems. Supports SBC audio decoding. 6. Long Battery Life: Features a built-in 500mAh lithium polymer battery, providing up to 8 hours of playtime with charging while in use. Plug-and-play design requires no additional software or drivers for operation. Specification Item Type: Bluetooth 5.3 Receiver Material: ABS Model: D400 Bluetooth Version: V5.3 Sound Decoding: SBC Bluetooth Protocol Support: A2DP, AVRCP File Format: MP3, WAV, WMA, FLAC, APE Frequency Range: 2400MHz-2483.5MHz Frequency Response: 20Hz-20kHz Output Load: 16-320 Ohms (Adaptive) Transmission Distance: Approximately 10-30m (32.8-98.4ft) in open space Sound Input: Bluetooth, USB, Memory Card Output: AUX, Optical, Coaxial Memory Card: Supports up to 32GB (not included) Battery Capacity: 500mAh Lithium Battery (included) Remote Control Battery: CR2025 Battery x 1 (not included) Power Supply Interface: USB-C 5V Compatibility: Compatible with Android and iOS smartphones, tablets, TVs, game consoles, and other Bluetooth-enabled devices, as well as audio equipment with audio input interfaces Package List 1 x Bluetooth Receiver 1 x Remote Control 1 x Charging Cable 1 x RCA Cable 1 x AUX Cable 1 x Instruction Manual