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 temperature-compensated voltage-controlled 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. Single-ended 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:DC9V-15V (with reverse polarity protection) Working current:maximum 160mA Display digits:eight-digit LED display, up to eight digits Display brightness:eight-level LED brightness adjustable, factory set to the 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 O-99.9999MHz Frequency reference:5032 package 13.000MHz temperature-compensated voltage-controlled crystal oscillator, frequency stability is ±2.5ppm Type:Red Light Colour:As Shown Material:PCB Package Contents: 1 * RF Signal Frequency Counter 2 * Cable 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.