Device features: - FM electronic tuning - Automatic tuning and saving of stations - USB / SD / MMC slots - MP3 format reading - Large LCD screen - AUX input - Connection via ISO plug - Dust and shockproof Specification: FM Frequency range: 87, 5 MHz to 108 MHz Maximum sensitivity: ≤ 37 dBf Signal to noise ratio: ≥ 40 dB Stereo channel separation: ≥ 20 dB Maximum power: 4x45W MP3 Supported formats: MP3 Data carriers: USB memory stick / TF card Frequency response: (100 Hz ~ 10 kHz) - / + 8 dB Signal to noise ratio: ≥ 50 dB Channel separation: ≥ 35 dB Voltage harmonic distortion: ≤ 5%