Key features: FM full-range wireless transmission technology Supports Bluetooth music and hands-free calls Dual USB charging ports LED screen can display frequency, song number, and work status information Supports folder switching playback and song classification playback A variety of audio options Support for power and memory. Structural design precision, piano paint appearance Complies with EU CE and North American FCC wireless products EMC and Safety Directive, more secure and reliable Noise elimination function and built-in noise cancellation circuit to provide clear call quality APP function, lossless high-quality audio decoding, car battery voltage health warning, and high-current car charger Specifications: Interface: High-speed USB 2.0 USB output: 5 V/3.0A (Smart IC), 5 V/1A Screen: LED Power supply: DC 12 – 24 V Supported file types: MP3, WMA, APE, FLAC, WAV Operating current: 50 – 100 mA DC 12 V Bit rate: 64 – 320 kbps FM frequency range: 87.5 – 108 MHz Signal-to-noise ratio: 85 dB (FM: 65 dB) Harmonic distortion: <0.05% (FM: <0.1%) Operating temperature: 0 to 60°C (0 to 140°F) Transmission distance <5 meters Weight: 30 grams (approx.) Dimensions: 73 x 47 x 39 mm (2.87 x 1.85 x 1.54 in) Package includes: 1 x Car Bluetooth FM Transmitter with Car Charger