Bluetooth FM Transmitter with Dual USB Charging and Hands Calling Stay connected, charged, and entertained on the road with this Bluetooth FM transmitter. Designed for convenience, it combines powerful charging, multiple music playback options, and crystalclear hands calling in one compact device. Key Features and Benefits: Dual USB Ports with Safe Charging: Charge two devices at once while driving. One USB port (5V/1A) is dedicated for reading music from a USB disk, while the second speed USB charging port (5V/2.4A) quickly powers up smartphones, tablets, or other devices. Builtin overcharge protection keeps your devices safe. Three Ways to Enjoy Music: Stream your favorite songs with clear stereo sound via: A. Bluetooth connection from your smartphone or tablet B. USB flash drive (up to 32GB) C. TF card (up to 32GB) Supports MP3, WMA, FLAC, WAV, and APE audio formats for versatile listening. Ambient Blue Ring Light with LED Display: A soft blue LED ring automatically lights up when the transmitter powers on, making controls easy to find in lowlight conditions. The LED screen clearly shows volume level, car battery voltage, and current FM frequency for quick checks while driving. Hands Calling with Noise Reduction: Builtin microphone uses echo cancellation and CVC noise suppression technology for clearer conversations. One multifunction button lets you answer, reject, hang up, or redial calls with ease. The transmitter automatically switches from music to call mode when a call comes in, so you never miss an important conversation. Practical Use Scenarios: Daily commute: Keep your phone charged while enjoying playlists or podcasts from Bluetooth, USB, or TF card without draining your device battery. Road trips: Play music from multiple sources while keeping passengers connected by charging their devices simultaneously. Business travel: Handle important calls hands with clear audio quality and minimal background noise, maintaining focus on the road. This compact, easytouse FM transmitter offers reliable performance, wide compatibility, and streamlined controls, making it an ideal upgrade for any vehicle without builtin Bluetooth or advanced audio features.