DIY MCU Calculator Kit Digital Tube Calculator with Transparent Case

Features: LED display to show the data clearly. Pre-programmed design for easy operation. Includes add/subtract/multiply/divide/negative number/the decimal point function. Auto power off in 20s if there is no operation. Uses straight-in components, easy to solder. With transparent case, components can be well protected. Built-in CR2032 button cell for power supply. Specifications: Material: FR4 + Acrylic Power Supply: CR2032 PCB Board Size: 8.8 * 8cm / 3.46 * 3.15in Finished Product Size: 9.8 * 9 * 1.6cm / 3.86 * 3.54 * 0.63in Product Weight: 120g / 4.23oz Package Size: Approx. 15 * 10.5 * 2.5cm / 5.91 * 4.13 * 0.98in Package Weight: Approx. 137g / 4.83oz Package List: 1 * DIY MCU Calculator Kit 1 * User Manual(English)

LED display to show the data clearly.Pre-programmed design for easy operation.Includes add/subtract/multiply/divide/negative number/the decimal point function.Auto power off in 20s if there is no operation.Uses straight-in components, easy to solder.