This is a cost-effective frequency display component with an eight-digit digital tube display, which is mainly used to display the frequency value of equipment such as transceivers, and can also be used for conventional frequency measurement. 2.4 GHz frequency meter with PIC16F648A as the core. The frequency reference adopts a temperature-compensated voltage-controlled crystal oscillator (2.5 ppm -TCXO). Using a unique gate control method and precise time algorithm (non-timed interrupt method). Gate (display refresh) time 0.01 second/0.1 second/1.0 second optional, real-time display of frequency value. Single-ended input design, three frequency measurement channels (low channel/high channel/automatic channel) optional. Dual intermediate frequency design, intermediate frequency value and plus/minus mode can be preset separately. Adopt eight-digit 0.56-inch high-brightness digital tube display, eight-level brightness adjustable. Invalid zero automatic blanking, invalid frequency value display filtering optional, last digit blanking optional. Simple circuit, reasonable structure, double button control, simple operation. All settings are automatically saved and can be directly called when powered on. Working voltage: DC input DC 9V-15V (with power supply polarity reverse protection) Working current: maximum 160 mA Onboard interface: DC IN (power interface): HX2.54-2P socket RF IN (signal input): HX2.54-2P socket ICSP (programming interface): 2.54-6P pin Colour:Green Material:Plastic + Metal Package Contents: 1 x Frequency Counter 2 x 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.