[Dual USB Ports Car Charger]: 2 USB charging port for most USB device, support charging two devices simultaneously. One is smart 3.1A for quick charging, up to 4X faster than standard chargers, able to charge compatible devices to 80% in about 30 minutes, and the other one can also read U disk for playing music.[Hands-free Calling & Voice Navigation]: Built-in high-performance microphones with noise-cancelling technology provide clear calls. Automatically switch to hands-free mode from music playing status when receiving calls. Answer/reject/hand up/redial all in One key. Besides, you can also get clear voice navigation from your phone or pads app.[Automatically Pairing]: The FM Bluetooth transmitter for car can automatically connect to memorized paired device when power on. Perfect compatible with most of smartphones and devices that equipped with Bluetooth function.[Bluetooth 5.0 Hi-Fi Music]: This 2022 car FM transmitter is equipped with Bluetooth V5.0, noise and wind suppressed by CVC technology that can achieve full duplex sound quality, providing faster pairing and more stable. You can enjoy Hi-Fi stereo sound music without any interference.[Blue Light & Voltage Detection]: When plugged into the cigarette lighter, the FM transmitter would display cars voltage, always keep abreast of car battery health to avoid problems when driving. With the blue backlight, this car charger makes it easier to operate while driving at night, ensuring your safety.Accurate structural design. Adopted reinforced anti-skid sheets on both sides, more stable and durable.