Features: Speakerphone support, built-in microphone, convenient and safe to answer the phone. Noise handling during calls, wind noise suppression. Support mobile phone A2DP function, directly play high-quality mobile phone music, support FLAC,WAV and other lossless music formats. Come with charging device, you can charge your devices. Automatic detection of car battery voltage, voice reminder, support voltage view. Support card and U disk expansion playback. Double USB charging port, with intelligent identification, fast charging. Knob design, one clicking operation to adjust volume/answer/call back. Suitable for drivers, car owners, people who like to listen to music in the car, and people who need to charge while driving. Used in car, such as long-distance travel, commuting, family outings, etc. By connecting your phone or other devices, you can enjoy high-quality music at any time and solve charging problems. Specifications: Material: Plastic USB Port: QC3.0 5V/9V/12V Input Voltage: 12-24V Output Current: 1000mA Frequency: 20Hz-20KHz FM Frequency: 87.5MHz-108.0MHz Size: Approx. 14x4.5x9.5cm/5.51x1.77x3.74in Package Includes: 1x FM Transmitter note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.