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.Upgraded V5.0 Bluetooth Version- This upgraded version metallic feel fm transmitter, it gives people a higher level of feeling, unlike the old version of cheap plastic material. And it 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.Siri Voice Assistant: This FM transmitter Bluetooth supports voice commands to ensure safe driving. You can use Siri or Google Assistant to make phone calls, send texts or get driving directions. It makes everything simple and safety!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.