NOTE: BTR005 is not a Bluetooth transmitter > so it CAN NOT pair with Bluetooth headphones/speaker or airpods. Compatible with the general aux 3.5mm headphone jack (Not available for four-pole pins or recessed port.). ✓ SMART CONNECTION EASY TO USE? All-in-one MFB designed for easy handling calls and playing music, Bluetooth audio receiver will automatically connect the previous connected device each time once powered on. ✓ MINI SIZE - POWERFUL ENERGY?This Bluetooth AUX receiver its designed with aluminum slim body, comes with 3.5mm AUX Jack, get rid of the tangle cables. Enjoy wireless music for 5 hours battery life with one charging for 1.5 hours. ✓ BT5.0 WIDE COMPATIBILITY?The Aux Bluetooth adapter is backwards compatible with Bluetooth V5.0 V4.2 V4.1 V4.0 etc. BT Ensure faster transmission and maintains a steady connection up to 50 ft in open area. ✓ SAFETY HANDS-FREE CALLING?Aux Bluetooth adapter for car, built-in microphone can set free your hands during answer the calls and let you safely and conveniently drive. Dual link to 2 Bluetooth devices simultaneously, streaming music from anyone of them. ✓ UPGRADE YOUR WIRELESS LIFE?MaedHawk Bluetooth car adapter aux input enable to convert your old home wired speakers or headphones into wireless, enjoy streaming music and get rid of long boring car trip.