The Astrum FM310 Wireless FM Transmitter is your all-in-one solution for smarter, safer, and more enjoyable driving. Designed for seamless Bluetooth connectivity, it enables hands free calling and wireless music streaming directly from your smartphone to your car’s FM stereo. Equipped with dual fast-charging ports USB-A and USB-C (PD) you can power up multiple devices simultaneously while on the road. The FM310 supports MP3 and WMA formats via TF card (up to 32GB) or USB stick, giving you flexible playback options for long trips and daily commutes. Its LED display makes tuning into your favorite FM station effortless, while the Auto Switch feature transitions smoothly between calls and music. With built-in buttons for track selection, volume control, and mode switching, you’re always in command of your sound experience. Key Features 📱 Bluetooth Connectivity – Stream music and take calls hands-free 📻 FM Transmission – Wirelessly broadcasts to your car stereo 🔌 Dual Fast-Charging Ports – USB-A & USB-C (5V 2.4A each, 4.8A total) 💾 TF Card & USB Playback – Supports MP3/WMA formats, up to 32GB 🔁 Auto Switch Function – Seamless transition between calls and music 🌟 LED Display – Clear tuning and playback visibility 🎚️ Built-In Controls – Track selection, play/pause, and mode switching 🕒 12-Month Manufacturer Warranty – Reliable long-term performance Technical Specifications Feature Details SKU A70531-B Product Code FM310 Rated Input DC 12V / 24V USB-A Output 5V 2.4A USB-C Output 5V 2.4A Total Output 5V 4.8A Music Format Support MP3 / WMA TF Card Capacity Up to 32GB FM Transmission Range 87.5 – 108 MHz Dimensions (L × W × H) 52 × 38.5 × 87 mm Net Weight Approx. 30g Warranty 12 Months Limited Manufacturer Warranty What’s Included 1 × Astrum FM310 Wireless FM Transmitter 1 × User Manual Ideal Use Cases 🚗 Hands-free calling and music streaming while driving 🔋 Fast charging for smartphones and tablets on the go 🎶 Road trip audio from TF card or USB stick 📻 FM radio access with easy tuning and LED feedback