High-concerned chemical: None - This Bluetooth receiver adapter is designed with your safety in mind, containing no high-concerned chemicals, making it a safe choice for your family and the environment. Content: Audio & Video - Enjoy seamless audio and video streaming through this versatile Bluetooth 5.3 receiver adapter, perfect for upgrading your car audio or home stereo system without the need for complex installations. Specifications: From aux to Bluetooth, Bluetooth to aux - This versatile device supports various configurations, making it an essential accessory for your audio setup. Description/Features: [BLUETOOTH 5.3 ENHANCEMENT] Elevate your audio experience with our cutting-edge Bluetooth 5.3 AUX adapter. Transform any non-Bluetooth car stereo, home speaker, or wired headphones into a wireless streaming device. [CRYSTAL CLEAR SOUND & WIDE COMPATIBILITY] Equipped with the latest audio technology, our Bluetooth adapter supports various codecs and profiles, ensuring high-fidelity sound and broad device compatibility. Experience crystal-clear audio for both music and calls, without any lag. [HANDS-FREE OPERATION & VOICE ASSISTANCE] Enhance your driving safety with hands-free calls and easy access to voice assistants. Utilize the built-in HD microphone and simple multifunction button to manage calls, interact with Siri or Google Assistant, and navigate without distractions. [DUAL CONNECTION & SMART DESIGN] Connect two devices simultaneously with our dual-link capability, allowing seamless switching between music and calls. The adapter features a sleek, compact design with a retractable coiled cable for neat setup and a vibrant light ring for visibility in low-light conditions. Note: The actual color may vary slightly due to lighting conditions and monitor settings. Size tolerance is +/- 1-3c