【Enjoy Wireless Streaming HI-FI Music】: Via the 3.5mm AUX adapter, SDNCIE's Bluetooth receiver can connect to non-Bluetooth car audio system, home stereo, speaker, and wired headphone; Equipped with an advanced Bluetooth 5.1, provides HI-FI wireless audio experience with a built-in CSR smart chip, it has stable connection, fast transmission, and wide signal range. HD audio decoding technology brings lossless music enjoyment. | 【Intelligent Active Noise Cancelling】: SDNCIE's Bluetooth 5.1 AUX audio receiver adopts dual noise-canceling technology, The latest CVC8.0 Noise Cancellation and Digital Signal Processor (DSP) technologies, combined with an enhanced mic which can eliminate echo and block out intrusive background noise (such as wind, traffic, or crowds), Allows you to enjoy crystal clear sound quality on all of your calls. | 【16 Hours of Long Battery Life】: The working time of this aux Bluetooth receiver adapter is up to 16 hours when making calls or playing music. And it takes only 1.2 hours to fully charge the device by using a Type-C fast charging cable (Included in the package). In addition, this Bluetooth music adapter can be used while charging, which is very convenient. | 【Hands-free Calling & Navigation】: A built-in microphone picks up sound, and the multi-function "MFB" button Answer/Redial/Hang Up/Reject Calls, help you make hands-free calls. Designed with volume up/down button, it is very convenient to adjust the volume of music. Also, Our Bluetooth audio receiver also supports broadcasting voice notifications from existed navigation Apps. You don’t have to look down the phone on the move. You can have convenience, efficiency, and safe driving. | 【Dual Device Connection】: One key to power on and enter pairing mode, This portable Bluetooth audio receiver can connect to 2 devices at the same time. Switch easily from one phone to another while calling or playing music. Once paired, the car receiver will auto-reconnect to your last paired Bluetooth devices within the wireless range.