[6-digits DIY Calculator Kit]Elevate your soldering skills with electronic project kit, designed to help you craft a practical desktop calculator. The big size of the buttons prevents you from hitting the wrong button, with transparent acrylic shell, this DIY calculator kit is the ideal companion for both studying and working. [Functions & Features]:(1)USB or button battery powered for greater ease of operation(2)Basic arithmetic operations, with decimal points and negative numbers. And it can be calculated continuously.(3)Measure the resistance value of the four-ring or five-ring resistance, enter the color ring colors in order to obtain the resistance value. This feature is designed to help you calculate resistance values without voltmeter, ideal for those interested in electronic components. [School Learning Project]: After the soldering is completed, you will get a full sense of accomplishment, which is the charm and fun of DIY! This diy kit not only enhances your soldering skills but also deepens your familiarity with electronic components and exposes you to fascinating electronics concepts. An electronic soldering project kit designed for both school soldering practice and family education. [Easy Soldering]: All components are through-hole soldered with clearly mapped and marked connections on the PCB. Soldering time 1-2 hours, suitable for DIY electronics enthusiasts and beginners. But please note, this soldering kit requires certain foundation of basic electronic theoretical knowledge and soldering and hands-on ability, assembly keys need a little patience. Colour:As Shown Material:plastic Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Package Contents: 1 x Soldering Practice 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.