1.Bluetooth 5.0Hand-free CallingBuilt-in latest bluetooth 5.0 chip set and FM transmitter make it possible for our bluetooth FM transmitter to maintain stable signal connection for hand-free calling music playing Goolge Voice Guide etc. and lets you focus on driving while enjoying the music or radio channels.^ 2.Dual USB Fast ChargeQC 3.05V/1AInput:12-24V Output:QC 3.0(5V/3A)5V/1A. Equipped with two usb charging ports our dual usb charger enables you to charge two device simultaneously at fast speed through smartly detecting loading device and providing fastest power supply. Quick Charge 3.0 port up to 4X faster than standard chargers is able to charge compatible devices to 80% in just 35 minutes.^ 3.Three Music Playing ModeHD SoundApplied with latest CVC noise depression technology our car radio adapter enables you to feast on high quality and lossless music through streaming music from smart devices with bluetooth max. Besides MP3/wma/wav/flac music format is supported to maximum reduce the sound quality loss during decoding.^ 4.SIRI/Google Assistant SupportedOur car bluetooth FM transmitter supports voice control to ensure safe driving using Siri or Google Assistant to make phone calls play music send texts or get navigation.^ 5.7 Backlight OptionsWidely Compatible Our bluetooth radio transmitter is compatible with most vehicle with voltage 12-24V such as wagon/SUV/Copper/MPV/Pickup/light truck. But please note that it is not suitable for heavy vehicle with voltage more than 24V. Besides 7 adjustable backlight enables you to create most favourite romantic or tuning atmosphere in accordance with the in-car music