Spectrum Analyzer. Need a screen shots ? 4 1/2″ screen. Has features found in analyzers that cost 3 times as much. 920-2150 Mhz, measures digital and analog in db, Digital c/n ratio in db, DVB QPSK BER, Bit Error Ratio, DVB QPSK Constellation sheet, Analog FM Demodulation from 5.5-8.5MHz, Analog picture (PAL/NTSC/SECAM Memory: 3X100 Banks for spectrum and frequency. Operates 1-2 hours on internal battery. Has internal battery charger.