FM transmitter upgrade kit, Bluetooth FM transmitter radio adapter with dual USB car charger and MP3 player jack

Smart Dual-Port Charging: Two USB ports support fast charging and can simultaneously charge two devices for optimal performance. Intelligent temperature control and short-circuit protection ensure safe charging. Hands-Free Calling and More Stable Voice Navigation: A stable Bluetooth connection and CVC noise reduction technology provide a superior hands-free calling experience. You also get clear voice navigation via a mobile app. Battery Voltage Monitoring and Blue Indicator Light: Equipped with a voltmeter, this device displays your battery status. Stay informed about its condition and avoid problems while driving. Wide Frequency Range and Compatibility: This Bluetooth transmitter is compatible with most smartphones and other Bluetooth devices. Furthermore, its wide frequency range (87.5 MHz to 108 MHz) allows you to enjoy a more stable and interference-free music experience.