This is a 1.2GHz frequency meter with automatic setting retention, allowing direct startup recall. It features a temperature-compensated voltage-controlled crystal oscillator (2.5ppm TCXO) for stable frequency reference. The gate (display refresh) time options are 0.01 seconds, 0.1 seconds, and 1.0 seconds, enabling real-time frequency display. The device has a single-ended input design with three selectable frequency measurement channels: low channel, high channel, and auto channel. It includes a dual intermediate frequency (IF) design, allowing separate presetting of IF values and plus/minus modes. The unit has a simple circuit design, durable structure, dual-button control, and user-friendly operation. Operating voltage: DC 9V–15V (with reverse polarity protection) Maximum operating current: 160mA Display: Eight-digit LED, up to 8 digits Brightness: Eight-level adjustable LED brightness (factory default set to maximum) Gate time options: 0.01s, 0.10s, 1.0s Measurement channels: Low channel, high channel IF settings: Configurable for add or subtract IF mode, minimum step 100Hz, range 0–99.9999MHz Frequency reference: 13.000MHz TCXO in 5032 package, 2.5ppm stability Type: Green Light Color: As shown Material: PCB Package Includes: 1 x RF Signal Frequency Counter 2 x Cable Note: Light reflection and display differences may cause slight color variation between the image and actual item. Measurement may vary by +/- 1-3cm due to manual measurement.