1. Plug-and-Play Bluetooth Audio Receiver: Multiple interface options (3.5mm AUX, Coaxial, Optical Fiber) enable easy Bluetooth connectivity for older audio devices. 2. Bluetooth Audio Receiving Mode: Supports 3.5mm AUX, Coaxial, and Optical Fiber audio output. Multi-device expansion ready for flexible setup. 3. Connect to legacy speakers or power amplifiers via 3.5mm AUX, Coaxial, or Optical Fiber input. Solves the lack of built-in Bluetooth in traditional audio equipment. Compatible with a wide range of older amplifiers and speakers. Strong signal stability with low latency. Supports aptX-HD for high-fidelity audio. Enjoy CD-grade sound quality. 4. aptX-HD decoding delivers high-resolution, low-latency wireless audio. Enables near-lossless sound quality comparable to wired connections. 5. Equipped with Bluetooth 5.2 chip for stable, reliable transmission up to 15 meters. Low-latency performance and high audio fidelity ensure accurate signal reproduction. Note: This is a Bluetooth audio receiver only — not a transmitter. Designed exclusively for audio playback. Not compatible with keyboards, mice, or file transfer devices. Product Name: aptX-HD Bluetooth Audio Receiver Model: D300-HD Bluetooth Version: Bluetooth 5.2 Interfaces: 3.5mm AUX / Coaxial / Optical Fiber (single output at a time) Operating Range: Up to 15 meters Charging Port: USB-C Battery Capacity: 500 mAh Playback Time: Up to 10 hours Supported Codecs: aptX, aptX-HD, SBC, AAC Frequency Range: 2400–2483.5 MHz Frequency Response: 20 Hz – 20 kHz Compatible With: Wired speakers, home speakers, power amplifiers, headphones, car audio systems, etc. Type: Bluetooth Audio Receiver