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 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.