Stable Bluetooth Transmission: Advanced Bluetooth 5.3 technology provides a stable connection for music streaming and hands-free calls via FM frequency. Built-in microphone supports intelligent voice navigation from your phone, and answering or ending calls is easy with one button. No need to hold your smartphone, making your driving safer. Fast Charging: The car charger can quickly charge two devices simultaneously via the Type-C port (30W Max) and USB 5V/2.4A port (12W Max). Built-in overcurrent protection, overvoltage protection, overcharge protection, overdischarge protection, and short circuit protection ensure safe charging. Bluetooth Hands-free Calling: Answer/Reject/Hang up/Redial all with one button. Automatically switches between incoming calls and music. Displays and detects vehicle voltage after connection. Enjoy voice control and safer driving with this Bluetooth FM transmitter. Hi-Fi Sound Quality and Noise Reduction: Noise reduction technology reduces background noise and provides high-quality stereo music streaming and crystal-clear calls. You can also play your favorite music on your car stereo via Bluetooth, TF card, and USB flash drive. Broad Compatibility: Suitable for iPhone 15 14 13 12 11 Pro Max Plus Mini, iPad iPod Android Mobile Phone Tablet Samsung Galaxy Tab and other mobile devices with built-in Bluetooth. Fits 12V-24V cars and trucks.