This is a 1.2GHz frequency counter. All settings are automatically saved and recalled upon power-on. The frequency reference uses a temperature-compensated voltage-controlled crystal oscillator (2.5ppm -TCXO). Gate time (display update) is 0.01 seconds/0.1 seconds/1.0 seconds, with real-time frequency display. Single-ended input design, three frequency measurement channels (low channel/high channel/auto channel) are selectable, dual intermediate frequency design, intermediate frequency value and plus/minus mode can be preset separately. Simple circuit, reasonable structure, dual-button control, easy to use. Operating Voltage: DC9V-15V (with reverse polarity protection) Operating Current: Maximum 160mA Display Digits: Eight-digit LED display, up to eight digits Display Brightness: Eight levels of adjustable LED brightness, factory default is highest brightness Gate Time: 0.01 seconds/0.10 seconds/1.0 seconds Measurement Channel: Low channel/High channel IF Setting: Can be set to add IF or subtract IF mode, the minimum step is 100Hz, range 0-99.9999MHz Frequency Reference: 5032 package 13.000MHz temperature-compensated voltage-controlled crystal oscillator, frequency stability is 2.5ppm Type: Green Light Color: As Shown Material: PCB Package Contents: 1 * RF Signal Frequency Counter 2 * Cable Note: Light shooting 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.