Feature:1. This is a frequency meter based on PIC microcontroller, with crystal vibration measurement function and programmable frequency settings.2. With fivedigit digital tube display, the measurement data display is intuitive and convenient.3. All of them use directplug components. The circuit is simple, easy to make, easy to install and debug.4. The measuring frequency range of this DIY frequency meter is 1Hz50MHz, which can measure the oscillation frequency of most commonly used crystal oscillators.5. Fivebit resolution (e.g. 0.0050kHz, 4.5765MHz, 11.059MHz) supports automatic range conversion.6. Programmable add and subtract frequency settings for measuring equipment such as radio transceivers.7. The powersaving mode can be selected, and the display can be automatically turned off if the frequency does not change significantly within 15 seconds.8. Universal USB 5V interface can be used for power supply, or external DC power supply or 9V battery can be used.Specification:Condition: 100% Brand NewItem Type: Frequency Meter ModuleMaterial: PlasticColor: RedFrequency Measurement Range: 1Hz-50MHzPCB Size: Approx. 80x53mm / 3.1x2.1in Package List:1 x Bag of Frequency Meter Module Parts DIY Kit