【Bluetooth Version 5.0】- Upgraded Bluetooth 5.0. Provides a stable connection and echo-cancellation which provides a crystal clear sound and reduces background noise for better hands-free calls. Answering/ redialing/ hanging off a call/ rejecting by pressing a button, assures driving safety. | 【Dual USB Ports & QC3.0】- Two USB ports for charging devices, It has two USB charging ports, one supports 1A charging and one supports 2.4A charging. It can charge two devices at the same time and has overcharge protection. Smart QC 3.0 USB charges compatible devices up to 4x speed of the conventional car charger. | 【Hands-FREE CALLING】- Built-in microphone, this Bluetooth FM transmitter enables you to answer, hang up, reject a call or redial the last number with ease. You can use multi-function button controls call and music. | 【3 MUSIC PLAYING MODES】- This upgraded bluetooth fm transmitter suports play music via bluetooth, TF card and USB disk. Easily make crystal clear hands-free calls with CVC noise cancellation technology. | 【7 RGB Color LED Backlit Version】- This bluetooth radio transmitter supports 7 colors led backlit light, you can get visually stunning display of colors. Also it make it easier to operate and drive safely when driving at night.