5.0 Bluetooth 5.0 and Stable Connection: The Aux Bluetooth Adapter for Car can receive Bluetooth signal within 10 meters, lossless music playback and stable call signal, so you can have a pleasant music environment while driving Super Battery Life: This Bluetooth 5.0 Transmitter Receiver has a very long battery life, built-in 250 mAh battery, can last 6 hours of use, standby 60 days, using the USB port charging, fully charged in just 2h, can be used while charging, flexible use Compact And Convenient: Product size 64*37*12 mm, weight 11 g, compact size, easy to carry, accept/transmit two-in-one, can be converted with one key; You can easily carry this Portable Wireless Bluetooth Adapter with you for car Lossless Sound Quality: This Bluetooth adapter supports A2DP,AVRCP,HFP,HSP and other specifications of audio resolution, using CVC energy noise reduction technology to remove noise, clearer sound quality, so you can enjoy the lossless sound quality of music; Also can convert non-Bluetooth devices to Bluetooth devices for wireless connection, suitable for cars, speakers, stereo systems and headphones Easy to Operate: This Wireless Bluetooth Adapter connects to the AUX port of other devicess and talk or listen to music through Bluetooth connection; just press the power switch to play/pause music, and also support volume adjustment and song switching