1. Bluetooth Receiver/Transmitter The M12 Pro Bluetooth Receiver and Transmitter can transmit music from your cell phone, computer, or tablet to any home stereo system via Bluetooth. It can also transmit music from your TV, computer, projector, or amplifier to Bluetooth headphones or speakers with automatic proximity connection. Plug and play, easy to use. Note: After turning on, long press the RX/TX mode, then double press the power on button to enter pairing mode. The blue LED will flash rapidly. 2. Bluetooth 5.2 & aptX Low Latency Equipped with DSP Bluetooth 5.2 for a stable and reliable connection. Supports SBC, AAC, aptX, aptX-LL, and aptX-HD, with strong decoding capabilities to reproduce CD-quality high-fidelity stereo. Ideal for streaming audio from your TV, home stereo, or game console. Note: To achieve low latency, the Bluetooth device you are using (for example, a Bluetooth headset) must support aptX low latency. 3. Dual Microphone Wireless Karaoke Includes 2 wireless microphones that connect on power-up without complicated pairing. Each microphone can be adjusted for total output volume and microphone volume. Suitable for duets and group performances, great for family entertainment or parties, with no tangled wires. Note: For first-time pairing, turn on the microphone and press three times to enter pairing mode, then turn on the main unit to automatically pair. 4. Upgraded Knob & RGB Design A single knob switches the unit on/off, and adjusts volume, with separate knobs for bass and treble to tailor the live sound. RGB bottom lighting changes color to reflect different states, enhancing the room ambiance. 5. Digital Display Practical LED screen shows the decoding format, pairing status, current volume, bass/treble adjustments, and light effect status, providing clear, intuitive information for easy operation. Use scenarios - Watch TV or movies with low-latency audio delivered to Bluetooth headphones or speakers for a private, synchronized listening experience. - Stream music from a phone, tablet, or computer to a home stereo system for whole-room playback or party sound. - Host a karaoke session with two wireless microphones for duets or group performances, without cables, while controlling mic and overall volume. Compatibility and performance - Works with smartphones, tablets, computers, TVs, projectors, and amplifiers that support Bluetooth input or output as appropriate. - Designed for convenient plug-and-play setup, with straightforward RX/TX switching and pairing procedures. - Built-in display provides real-time information to help you operate quickly and confidently.