Bluetooth Aux Receiver for Car: Transform your old car stereo, home stereo, wired headphones, or speakers into wireless devices with this 3.5mm Bluetooth aux receiver. Compatible with most Bluetooth-enabled devices like smartphones, tablets, laptops, and computers. Enjoy Hands-Free Calls & Wireless Music: Pair with Bluetooth devices and use the built-in microphone for hands-free calls. One-button answering, rejecting, ending, and redialing of the last number. Designed with MFB and volume up/down buttons for convenient music volume adjustment. Bluetooth 5.0 & Dual Connection: Equipped with Bluetooth 5.0 for a stable connection. Connect 2 devices simultaneously, so you won't miss calls while listening to music. Bluetooth range up to 10 meters without obstacles. Automatically connects to the last connected device. Fast Charging & Long Battery Life: One button to power on and enter pairing mode. The built-in battery offers long battery life, supporting up to 16 hours of use after a full charge. Fast charging, fully charged in 2 hours. Portable: Weighing only 14 grams, it's very small in size. Take this Bluetooth audio receiver with you wherever you go. A great companion for drivers!