1.Bluetooth Receiver Adapter: is a multi-function adapter, high-frequency sound quality, stable transmission, car AUX interface, plug and play, bluetooth connection to the car stereo, both talk and listen to moving music, so that your journey is no longer lonely. 2.Upgraded 5.3 Bluetooth chip: car auxiliary bluetooth adapter adopts the latest bluetooth 5.3 chip, faster transmission speed, higher reliability, greater stability, lower power consumption; clear calls, ultra-low static noise, sound quality CD. 3.Bluetooth receiver built-in microphone: press the power button to answer or hang up the phone; pause or play music, no need to operate the cell phone, free your hands, safe driving. Ensure your safe driving! 4.Faster charging and longer battery life: Whether you're talking on the phone or playing music, the Bluetooth Assist Adapter has up to 8 hours of battery life. It takes only 2 hours to fully charge the device using the Type-C fast charging cable (included). In addition, this Bluetooth music adapter can be used while charging, which is very convenient. Specification Model: GT66 Interface: 3.5 Plug and Play: Plug and Play External power supply: no external power supply Transmission rate: 100 Effective working radius: 10 Bluetooth standard: 5.3 Operating frequency: 2400 Material: Plastic Package Includes 1x Bluetooth receiver 1xPackaging box 1x3.5MM audio header 1x Manual 1x Charging Cable