Feature:1. Wireless Transmission: The bluetooth 5.3 receiver makes it easy to wirelessly transmit hifi sound from any bluetooth enabled device (including smartphones, tablets, computers, laptops) to any stereo system or speakers.2. Bluetooth Receiver: Just a bluetooth receiver that provides bluetooth functionality to existing stereos, active speakers, car stereos, home stereos, 3.5mm wired headphones, not a bluetooth transmitter or amplifier.3. NFC Function: Bluetooth 5.3 receiver with upgraded NFC function, cell phone connects with a touch, NFC enabled mobile devices can be connected by touching the bluetooth receiver, convenient and fast.4. Input and Output: Support AUX, optical sound, coaxial sound output, compatible with most devices. Support Bluetooth sound, USB, memory card sound input, Bluetooth sound plus U disk playback and memory card playback function, easy to use.5. HiFi Stereo: Bluetooth 5.3 chipset is an advanced solution that provides premium wireless sound performance, ensures hifi sound signals for streaming music to your home stereo system, and supports SBC decoding.6. Long Battery Life: The bluetooth 5.3 receiver comes with a built in 500mAh lithium polymer battery that supports charging while listening for about 8 hours. The device is plug and play, no need to install any software driver, simple and fast operation.Specification:Item Type: Bluetooth 5.3 ReceiverMaterial: ABS Model: D400Bluetooth Version: V5.3Sound Decoding: SBCBluetooth Protocol Support: A2DP AVRCPFile Format: MP3 WAV WMA FLAC APEFrequency Range: 2400MHz-2483.5MHzFrequency Response: 20Hz-20KHzOutput Load: 16-320 AdaptiveTransmission Distance: Approx. 10-30m/32.8-98.4ft (Open Place)sound Input: Bluetooth Sound, USB, Memory CardOutput: Aux, Optical Sound, Coaxial SoundMemory Card: Support up to 32GB Memory Card (Not Included)Battery Capacity: 500mAh Lithium Battery (Included)Remote Control Battery: CR2025 Battery x 1 (Not Included)Power Supply Interface: USB C 5VCompatibility: for Android System, for IOS System of Cell Phones, Tablets, TVs, Game Consoles and Other Bluetooth Devices, And Sound Equipment with Sound Input Interface.Package List:1 x Bluetooth Receiver1 x Remote Control 1 x Charging Cable1 x RCA Cable1 x Aux Cable 1 x Instruction Manual