7 color LED Light Designed with 7 lights colors,including green/ red/ blue/ yellow/ cyan/ purple/ white/ flicker,The bling exterior electronics car kit makes your car more enjoyable.The LED light can be turn off. PD 20W & QC3.0 Charger This car charger adapter support QC 3.0 charge 18W and PD 20W charge.Up to 4X faster than standard chargers.Support 3 mobile phones charging at the same time. Volatge Monitor The normal voltage of the car’s battery is 11-13V. You can check the voltage of the car with our real-time voltage display function.Suitable for all 12-24V cars, trucks, SUVs. 3 Ways to play music Can play musics through Bluetooth connection, through U Disk or through TF card. One more model has one more option. Choose the way you like and enjoy your journey. Bluetooth Connection Method 1. Tune your car radio to a blank FM channel.(Recommend to use FM107.9 channel) 2. Insert the FM transmitter into the car cigarette lighter. 3. Tune the FM transmitter to the same channel as the car radio.If the static noise is loud after the channels are synchronized, please change to another blank channel. 4. Search for the Bluetooth device "T70" on the mobile phone and complete the Bluetooth connection. 5. Play music, wake up Siri / Google assistant, turn on voice navigation, and do whatever you want. 6. If you pursue high-quality sound quality, please try different blank channels and find the one with the least noise.