LED display, clear data display. Measurement frequency range: 1Hz~50MHz; signal frequency: maximum 30V. Can measure the oscillation frequency of the most commonly used crystals. Automatic range conversion, no manual switching required. Programmable positive and negative frequency settings for measuring radio transceivers. Features: * Includes five accuracy resolutions and power saving mode. * The display automatically turn off if there is no obvious change within 15 seconds. * Adopts a transparent shell to protect the components well. * Wide power supply, can be powered by USB/external power supply (5~12V)/9V battery. Note: This is a DIY kit, not a finished product; you need to assemble it yourself. Specifications: Part name: DIY frequency tester kit (unassembled) Measurement frequency range: 1Hz~50MHz Signal frequency: Maximum 30V Power supply: USB or external power supply (5~12V) or 9V battery Note: When installing the node, please remember to wear anti-static gloves. Color: & Transparent Material: PCB+Components Package Contents: 1* DIY frequency tester kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.