The oscillation frequency of most commonly used crystal oscillators can be measured; The measurable frequency range is 1 Hz-50 MHz; Five-digit resolution (for example, 0.0050 kHz, 4.5765 MHz, 11.059 MHz); This is a frequency meter based on PIC microcontroller, with crystal oscillator measurement function and programmable plus and minus frequency settings, five-digit digital tube display, convenient and intuitive, all use direct plug-in components, simple circuit, easy to make. Automatic range conversion, no manual switching required;, Manufacturer: Akfldms