Handheld Tiny Spectrum Analyzer 4 inch Touch Screen Build in Battery ,Avoid Switching Noise

Display size:4" TFT LCD (480×320) Max low input frequency:800MHz, 6GHz in Ultra mode Resolution filters in 1,3,10 steps:from 200Hz to 850kHz Max output frequency:Sinus up to 800MHz, Square wave up to 4.4GHz output level:-104dBm to -16dBm