【QC3.0 and PD Fast Charge】Dual USB and one type C port for fast charging enables you to charge 3 devices at the same time as well as offer a better charging performance. Equipped with a USB-C power delivery port and 20W output power, you could charger your lastest iphone, ipad, cellphones, tablets at full speed. | 【LED Voltmeter Display】The FM transmitter will display car’s voltage when plugged into the cigarette lighter. Keep abreast of car battery health at all times to avoid problems when driving. 【SAFE TO USE】Built-in over-current protection, over-voltage protection, short circuit protection, effectively prevents multiple problems. | 【7 Color Ring RGB Light】Bluetooth FM transmitter with 7 led backlit light, including red/ orange/ yellow/ green/ indigo/ blue/purple shut-off, design for music, with clear screen, no blind spot, driving safer. And it makes easier to be used at night and turned off with ease. | 【Power-off memory】wireless Bluetooth FM transmitter adapter for car radio,transfer calling/MP3 music/Cellphone voices to car speaker.When this product is powered off, it remembers the frequency that is used and the music in U disk that is played before when it is turned down. When this product is restarted again, it will continue play music that you listen to last time. | 【More compatibility】Wide Compatibility and Aux In&Output--Featuring Bluetooth 5.0 technology. It is compatible with most devices on the marke that Bluetooth enabled devices such as table,Samsung, Android smart-phones etc also all 12-24V cars or trucks.【Lossless Hi-Fi Sound】 The FM Transmitter Bluetooth 5.0 with DSP technology could deliver 2x steadier transmission speed without distortion for Hi-Fi stereo music.