The LPT-3000RX4-16 from LP Technologies is a RF Spectrum Analyzer with Frequency 9 KHz to 3 GHz, Attenuation Range 50 dB, AC Supply 100 to 240 Vac, Sweep Time 50 us to 1000 sec. Tags: USB / Computer Controlled. More details for LPT-3000RX4-16 can be seen below.