Compact & User-Friendly: Small size, aesthetically pleasing display, simple circuit design, and dual-button control for intuitive operation. Core based on the dedicated SJ8K24P-T chip, supporting measurements up to 2.7 GHz. RF signal input via IPEX connector with high sensitivity and low operating current. On-board electronic power switch (can be disabled), ideal for battery-powered applications. Precision Reference: Features a KDS/EPSON brand temperature-compensated voltage-controlled crystal oscillator (VC-TCXO) with ±2.5 ppm stability. Advanced Algorithm: Unique gate control method and precise gate time calculation (non-timer interrupt) for high accuracy. Configurable Display: Gate (display refresh) time: 0.64s / 1.0s, with real-time frequency value updates. Resolution Options: Frequency measurement resolution: 100 Hz (0.64s gate) / 64 Hz (1.0s gate), with trailing digit blanking. Dual IF Design: Two independent intermediate frequency (IF) settings. IF values and add/subtract modes can be preset separately without interference. Data Output: UART serial output for measurement data, enabling secondary development. Memory Storage: All settings automatically saved to EEPROM and loaded on power-up. Color: As Shown Material: ABS Package Contents: 1 * 20Mhz-2.7Ghz Frequency Counter