Improve your soldering skills with this electronic engineering kit, designed to help you make a practical desktop calculator. With a 1602 LCD screen that clearly displays numbers and large buttons that prevent you from clicking the wrong ones, this DIY calculator kit is the perfect for studying and working. Note: When not used for a long time, it will automatically enter power saving mode. This welding practice kit is easy to assemble and has a simple principle. Connections on the PCB are clearly mapped and labeled. The soldering time is 2-3 hours, suitable for DIY electronic enthusiasts, and can be used as a school or home education practice kit. But please note that this electronic soldering kit requires certain basic electronic theoretical knowledge as well as soldering and hands-on skills. (1) Basic arithmetic operations, with decimal point and negative numbers. (2) Measure the resistance value of the four-ring or five-ring resistor and enter the color of the color ring to obtain the resistance value. This feature is designed to help you calculate resistor values without a voltmeter, perfect for people interested in electronic components. (3)Convert between decimal and hexadecimal. (4) Measure the LED current limiting resistor. (5) Square root operation. Electronics soldering project kit designed for school soldering practice and home education. This DIY kit will not only improve your soldering skills, but also deepen your familiarity with electronic components and expose you to fascinating electronic . Highly recommended to students and home enthusiasts. Colour:As Shown Material:Metal+Plastic Package Contents: 1 set 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.