The NXE-90 from HAROGIC Technologies is a RF Spectrum Analyzer with Frequency 9 kHz to 9.5 GHz, Resolution Bandwidth 0.1 Hz to 10 MHz, Analysis Bandwidth 100 MHz, DANL -165.1 to -90.1 dBm, Amplitude Flatness ±2 dB. Tags: USB / Computer Controlled. More details for NXE-90 can be seen below.