Volume and Battery DisplayBluetooth car adapter outfitted with LED display screen which can clearly show battery status and volume levels. With 16 volume levels, you can have more accurate control over the devices sound output. Youll always know the power quantity and when to recharge, ensuring uninterrupted music playbackNoise Reduction & Dual ConnectionThe latest noise cancellation technology ensures clear call quality by eliminating background noise and other distractions. This AUX Bluetooth adapter for car supports connecting two devices at the same time. You can easily switch devices for calls and music while driving, and sharing music with your friends at travel.Hands-free Calling & NavigationEquipped with a built-in microphone and a multifunctional button, the portable car Bluetooth AUX adapter allows you to easily answer, redial, hang up, or reject calls, all while keeping your hands free. Moreover, this Bluetooth adapter supports voice notifications from your existing navigation app, ensuring a safer driving experience!Bluetooth 5.3 & Stable Connection The Bluetooth receiver is equipped with a Bluetooth 5.3 chip that ensures faster and more stable transmission, resulting in high-quality sound within a steady connection range of up to 33ft. Also it supports backward compatibility with Bluetooth 4.2/4.0/3.0/2.0 devices. After the first successful manual connection, this Bluetooth adapter for stereo receiver will automatically connect when its turned on again.Fast Charging & Long Battery LifeFully charged in just 2 hours using the Type-C fast charging cable (included in the package), this Bluetooth receiver 3.5mm offers up to 12 hours of battery life. This Bluetooth music adapter can be used while charging, and the high-efficiency lithium-ion battery ensures safe use during charging!