Fast Charging - QC3.0 Ports: Our bluetooth cigarette lighter is designed with two charging ports. The first is the QC 3.0 port, optimized to charge compatible devices to 80% in 35 minutes. Another, with music icon, supports 5V/2.4A to read USB drive/charge normally. Always there to meet your different needs. Crystal Hands-Free Calls: Adopted noise canceling technology (CVC), the high performance microphone creates full duplex sound and suppresses noise and wind, giving you a crystal clear call. Answer/hang up/decline/redial with just the click of a button and seamlessly switch between incoming calls and music, which makes it much safer and convenient for driving. Hi-Fi Music- 3 Reading Modes: This bluetooth transceiver can freely transmit clear stereo music in 3 ways: A.Bluetooth connection; B. USB flash disk (32G); c. TF card (32G)