Excellent Sound Quality: The Bluetooth car adapter uses the latest Bluetooth 4.1 connection technology combined with noise reduction and FM transmitter technology to effectively reduce background noise. It delivers CD-quality sound with deep bass and no interference. The built-in noise-canceling microphone allows you to answer calls hands-free without being distracted while driving. Multiple Music Playback Modes: Bluetooth connectivity enables wireless music streaming from portable devices. SD card slot for playing music from SD storage cards or audiobooks; USB port with a music symbol for flash drives and music playback in MP3 and WMA formats. 3.5mm AUX output for direct connection in the car with selectable channels from 87.5-108.0 MHz. Technology in Your Car: The signal transmission and FM signal are more stable. No signal loss is displayed, caller ID is supported, and the FM transmitter comes with a 21-key remote control, allowing anyone in the car to freely control music or calls. The adjustable angle ensures compatibility with all car types. Large LCD Screen: The 1.8-inch screen provides a better display for calls and music. It works with Bluetooth-enabled devices such as iPhones, iPads, iPods, tablets, smartphones, or MP3/MP4 players via the 3.5mm audio jack. The ideal screen size allows for safe driving without distractions. Ingenious Design: The FM transmitter blends seamlessly into any vehicle interior without taking up much space. The large control buttons ensure easy operation, preventing the need to take your eyes off the road to change tracks/volume, accept or reject calls, and more.