Fangrui Product Details 1: Spectrum Analyzer Scanning Frequency Range: 45mhz-4400mhz -110dbm To 10dbm (built-in Attenuator, Amplifier) 2: 100mhz Scanning Width Time: 250ms 3: Signal Source Output Frequency Range: 35mhz-4400mhz, -30dbm To 0 Dbm (built-in Attenuator To Achieve 1dbm Step) 4: 3.2-inch Resistive Touch Screen + Button Control 5: 3500mah Lithium Battery Powered 4 Hours Battery Life Type_c Charging Interface. Signal Output Interface Can Be Used As A Tracking Source Colour:black Material:abs Package Contents: 1 X Host 1 X Type_c Charging Cable 1 X Resistive Touch Pen 1 X Sam To Bnc Interface Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.