GR01 Bluetooth Receiver with Antenna, TF Card Slot, 3.5mm AUX Bluetooth Adapter for Car Speaker, Amplifier, Hands-Free Audio 1. Enjoy the excitement of wireless life with Bluetooth-compatible 5.1 audio adapter, BT5.1 transmission is more stable, TF card can be inserted, feel lossless music, colorful atmosphere lights, music night vision atmosphere lights, and colorful breathing mode 2. External antenna increases long-distance signal interference with high gain. It supports stable transmission over a distance of 50 meters and ultra long Bluetooth-compatible transmission over a distance of 50 meters. With one external gain antenna, it reduces signal interference and can receive up to 50 meters in an accessible environment 3. Support Bluetooth-compatible TF card audio input, toggle button to select audio mode, simple and convenient operation, Bluetooth 5.1 rejects delay lag, equipped with high-performance Bluetooth chip, stable low latency connection is more stable and smooth, transmission is clearer, Hi Fi lossless sound quality, signal is more stable 4. Multiple devices are plug and play, receiving Bluetooth-compatible signals and outputting audio to speakers, headphones, and other devices through AUX. The rich interfaces are widely compatible and can be connected to old-fashioned speakers, amplifiers, and other devices for wireless transmission. Wired to wireless old-fashioned speakers are fully revived, connecting sound, breaking space limitations, and enjoying wireless stereoscopic amplification playback sound effects. It is lightweight and portable, suitable for both home and outdoor use, 5. Support one to two unlocking for more fun, connect two Bluetooth devices at the same time, use in multiple occasions, workentertainment at the same time Specification: 1. Name: Wireless Bluetooth Receiver 2. Model: GR01 3. BT version: V5.1 4. Transmission distance 50M 5. Bluetooth-compatible protocol: A2DPAVRCP 6. Input voltage: USB-DC5V 7. Output interface: 3.5mm stereo interface 8. Fully compatible: Personal computer, Android system, iO5 sys