【7 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. | 【Dual USB Charging Ports & QC3.0】- This car fm transmitter with two USB ports for charging devices, It has two USB charging ports, 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. | 【Crystal Clear Hands-Free Call】- 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. | 【Hi-Fi Music & 2 Playing Modes】- This upgraded bluetooth car adapter suports play music via bluetooth, USB disk. It can bring you an amazing auditory experience with its clear and stereo sound. | 【Upgraded V5.0 Bluetooth Version】- This upgraded version fm transmitter adopt the advanced Bluetooth V5.0 chip, which is stronger than other common products and has higher transmission, which can effectively avoid the problem of unstable connection.