RF Explorer 3G Combo Plus Package - Includes Blue EVA Carrying Case,USB Cable, 10db Attenuator, Power Limiter and SMA Termination Frequency band: 15MHz-2.7GHz; Frequency span: 112KHz - 100MHz Backlight for great indoor visibility; Graphics LCD 128x64 pixels, great visibility outdoors PC Windows client supports Windows XP/Vista/Win7 both 32 and 64bits Audio Analysis by means of an acoustic signal proportional to the modulation frequency Average noise level (typical): -110dBm