This voltmeter has fast response speed, high accuracy, clear display, intuitive readings, and good stability; advanced and reasonable circuit design, strong anti-interference ability, and can effectively suppress high-frequency interference; the kit uses high-quality materials, sophisticated technology, and beautiful appearance. Long service life, extremely convenient installation and use. It is a voltmeter suitable for welding and assembling by various universities and DIY enthusiasts. Kit name: ICL7107 voltmeter DIY kit PCB size: 70.6x39mm Mounting hole size of meter head: 77x40mm Display window size: 51x24mm Electrical parameters: Working voltage: DC5V Working current: 35mA Measurement accuracy: It can be calibrated to obtain higher accuracy, and there are no parameters temporarily. Measuring range: divided into 3 gears, 0-2V gear measuring small voltage 0-20V range to measure low and medium voltage 0-200V gear, measure higher voltage. Colour:As shown Material: PCB Package Contents: 3 set x Voltmeter spare parts 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.