This is a 1.2GHz frequency meter. All settings are automatically saved and can be called directly when the machine is turned on.The frequency reference uses a temperaturecompensated voltagecontrolled crystal oscillator (2.5ppm TCXO).The gate (display refresh) time is 0.01 seconds/0.1 seconds/1.0 seconds, and the frequency value is displayed in real time.Singleended input design, three frequency measurement channels (low channel/high channel/automatic channel) are optional, dual intermediate frequency design, intermediate frequency value and plus/minus mode can be preset separately.Simple circuit, reasonable structure, dual button control, simple operation.Working voltage:DC9V15V (with reverse polarity protection)Working current:maximum 160mADisplay digits:eightdigit LED display, up to eight digitsDisplay brightness:eightlevel LED brightness adjustable, factory set to the highest brightnessGate time:0.01 seconds/0.10 seconds/1.0 secondsMeasurement channel:low channel/high channelIF setting: can be set to add IF or subtract IF mode, the minimum step is 100Hz, range O99.9999MHzFrequency reference:5032 package 13.000MHz temperaturecompensated voltagecontrolled crystal oscillator, frequency stability is 2.5ppmType:Green LightColour:As ShownMaterial:PCBPackage Contents:1 * RF Signal Frequency Counter2 * CableOnly 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 +/ 13cm.