Features Premium Performance: High -performance 1.2GHz frequency counter PIC16F648A based on micro -chip -based 8 -bit micro -controller, LCD0802 LCD screen display, up to 7 digits can be displayed, and the invalid frequency value is automatically blank. Frequency: The minimum step of intermediate frequency adjustable is 100Hz, the intermediate frequency range is 0~999.9999MHz, and it is set to plus or minus intermediate frequency mode Excellent Design: Reverse power design, providing low -power battery power solutions, equipped with dual buttons control, and good shelf interface. Frequency Design: Built in frequency reference adopts temperature‑compensated voltage‑controlled crystaloscillator (±2.5 ppm VC‑TCXO), Adopt dual intermediate frequency design, intermediate frequency value and plus/minus mode can be preset separately Excellent After-sales Service: We provide you with high-quality after-sales service. If you have any questions, please feel free to contact us, and we will deal with it for you as soon as possible. Specification: Item Type: Frequency Measurement Module Material: PCB Uses: Mainly used for DIY transceivers for frequency value display, and can also be used for regular frequency measurement Gate Time: 0.64s Measuring Range: 1MHz~1.2GHz Measurement Accuracy: ±100Hz Working Voltage: DC 9V~12V Working Current: Enable Backlight: <55mA Display Digits: The highest 7 digits display Frequency Reference: 13.000MHz temperature compensated voltage controlled crystal oscillator (VC-TCXO) in 5032 package, frequency stability is ±2.5ppm Channel Sensitivity: (HM8134-2 data)  Test frequency（MHz） 5 10 30 60 100150  200300 450  Sensitivity（mV RMS） 35 20 10 3 3 4 8 15 12Test frequency（MHz） 500 550 600 700 800 9001000 1100 1200 Sensitivity（mV RMS） 14 30 65 80 80 35 175 270 310 Onboard Interface:  RF INPUT (measurement signal input): XH2.54-2P square socket ICSP INPUT: XH2.54-6P pin POWER INPUT: XH2.54-2P square socket How to Use:  1. Please check the power supply voltage (DC 9V-12V) and polarity before use, and then turn on the power supply after confirming that it is correct. The machine has a fool-proof design, the power supply polarity is reversed, the machine will not work, but it will not produce destructive consequences. 2. The measurement signal input is connected to the test line (wired method) or antenna (induction method) with the 2P square socket. 3. Turn on the power of the instrument to warm up for a few minutes and wait for the frequency reference to stabilize before performing measurement operations. Package List: 1 x Module 2 x Connection Line Package List 1 x Module 2 x Connection Line