Both ports can be fast-charged at the same time hu not affect. One-Touch Smart Controls - Safe Driving: ▶️ Play/Pause | ⏭ Next Track | ⏮ Last Track | ☎️ Answer/End Calls – All without touching your phone! Perfect for older vehicles without Bluetooth! Ratchet Load Binders | Ratchet Chain Binder | Lifting Gear Direct Bluetooth F Transitter Car - SOOFON V5.3 Bluetooth Car Adapter with... Fm Transmitter Pd30w+Usb Car Charger Mp3 Player Car Kit With Led Ideal for use in the dark to improve driving safety. How to pair the car radio / the FM transmitter and your phones Bluetooth: 1. Select the car radio to FM mode(NOT AM mode),then choose a blank unused channel(it's very miportant). 2. Insert the FM transmitter into the cigarette lighter socket, and long press the ☎️ button, and FM frequency flashing. 3. Press ⏭ / ⏮ button to to select th frequency. 4. Activate your phone's Bluetooth, select the ID BT-CAR Kit from the list, and once paired successfully, you can listen to music and make phone calls. Bluetooth Transmitter Pgaded Bluetooth FM Tansmitte Fo Ca, PD30W/QC18W Dual Usb C Car Charger 3-Way Playback - Bluetooth 5.3/USB Drive/AUX Input: ① Bluetooth 5.3 for stable wireless music & calls (auto-connects to BT-CAR Kit). ② Plug & Play USB – Insert a flash drive to instantly play MP3/WMA files. ③ 3.5mm AUX for direct wired connection (better than FM audio quality). How to Use USB/AUX Mode ? 1. USB Mode: Insert flash drive → auto-plays music (supports folders). 2. AUX Mode: Connect via 3.5mm cable → higher sound quality than FM. How to pair the car radio / the FM transmitter and your phones Bluetooth ? 1. Select the car radio to FM mode(NOT AM mode),then choose a blank unused channel(it's very miportant). 2. Insert the FM transmitter into the cigarette lighter socket, and long press the phone button, and FM frequency flashing. 3. Press 》 / 《 button to to select th frequency. 4. Activate your phone's Bluetooth, select the ID BT-CAR Kit from the list, and once paired successfully, you can listen to music and make phone calls. No more slow charging on the go!