[Colorful Big Screen ] Gooinng BC83 car bluetooth fm transmitter features a big display screen offering a wider visual interface for more information - See incoming calls, track names ,FM channels, music, car battery voltage, etc. Turn on/off the FM transmitter, it will turn off the FM and functions keep charging function. | [PD 20W & QC 3.0 Fast Charging] Charge 3 devices simultaneously with our Bluetooth car adapter. Dual USB and one type C charge port which can intelligently identify for android or iPhone devices fast charge , like iPhone, iPad, iPod, tablet, HTC, Galaxy, Sony, smartphones. | [Treble & Bass Music playing] The Bluetooth fm transmitter support Bluetooth /Aux out /microSD card/ MP3 player. Equipped with noise and wind suppressed by CVC technology that can achieve full duplex sound quality. You can enjoy the fantastic deep bass music by pressing the EQ button. | [Hands-free Calls] Built-in High-performance microphone, One-click the button to answer/redial/hang up or reject calls, swith to hands-free mode automatically from music playing status when receiving calls. Noise suppression technology dampens the road noise to provide clear sound for hands-free calls. | [Security Protection] The FM transmitter LCD screen displays the car voltage in real time, keep abreast of car battery health at all times to avoid problems when driving. Equipped with electric protection of over-voltage protection, over-current protection, intelligent temperature control, short circuit protection, it will ensure safe charging.