Features: Blue Ambient Light & Car Voltage Detection: With its stylish blue backlight, this FM transmitter doesn't just add a modern touch to your dashboard. It also displays your car's battery voltage, keeping you informed about its status at all times, for safer driving even in the dark. Car Charger with Dual USB Charger: Never leave your devices dead on the road. With its two USB ports (5V/2.4A & 1A), charge your devices simultaneously. The 1A USB port, with a music icon, allows you to listen to music via a USB disk while charging your device, while the 2.4A port offers fast and safe charging. Hands-Free Calling & Navigation Streaming: Enjoy worry-free driving with the hands-free function. Answer, redial or reject calls with the touch of a button. In addition, the transmitter supports navigation apps, allowing you to keep your eyes on the road. 3 Playback Modes: With advanced CVC noise cancellation technology, this FM transmitter provides you with exceptional sound quality. Enjoy your music in three ways: via Bluetooth, from an SD card up to 32GB (supporting various formats such as MP3/WMA/WAV/FLAC), or from a USB flash drive. Strong Compatibility: Compatible with a wide range of devices including iPhone, Samsung, HUAWEI, and many more, this transmitter ensures a smooth music experience without interference, thanks to its frequency range of 87.5 to 108 MHz.