Measurable frequency range 1 Hz-50 MHz (1Hz-50MHz);Measurable signal frequency up to 30VCan measure the oscillation frequency of most common crystal oscillators;-digit precision resolution;Automatic range conversion, no need for manual switching;Programmable plus and frequency for measuring equipment such as radio transceivers;Selectable power saving mode that automatically turns off the display if the frequency does not change significantly within 15 seconds;Wide range of power supply, you can use a common USB interface for power supply, or use an external power supply 5-12V or 9V battery;All in-line components, the number of components is small, and the installation and debugging are simple.Frequency meter displayColour:As ShownMaterial:PC+metalPackage Contents:1 x DIY meter frequency counter Tester KitOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.