Description Description: Measurement Rang: This DIY frequency counter kit measuring frequencies from 1Hz to 50MHz, suitable for a variety of applications including crystal oscillator frequency measurement Precision: It can measure signal frequencies up to 30V with a five-digit precision resolution, ensuring accurate reading for most common oscillators Automatic Range Switching and Settings: The device features automatic range conversion, eliminating the need for manual switching Energy Saving Mode : Designed with an energy-saving mode that automatically turns off the display if no significant frequency change is detected within 15 seconds Easy Assembly : The DIY kit is easy to assembly, DIY Frequency Tester supports a wide power supply range via USB or external power sources (5-12V) or a 9V battery Size Chart: 7.3cmx5.8cmx1.7cm/2.87inchx2.28inchx0.67inch Package Includes: 1 DIY Frequency Counter Module Kit Note: Please allow slightly errors due to manual measurement and different monitors.