Features 1、DIY BY YOURSELF: This is a DIY kit that needs to be soldered and installed by yourself, very flexible, suitable for beginners to DIY solder 2、SIMPLE PRINCIPLE: The working principle is simple, easy for students to learn and understand, useful and practical 3、STUDY DIGITAL CIRCUITS: Through the analysis of analog circuits, you can study the principle ability of digital circuits 4、COMPACT SIZE: Motherboard size for 42x33mm, easy to install, small size and lightweight, portable for you to carry 5、EXCELLENT PERFORMANCE: The circuit board material is made of glass fiber, which has good insulation, strong heat resistance, good corrosion resistance and high mechanical strength Specification Item Type: Analog Electronic Candle Making Kit Motherboard Size: Approx. 42 x 33mm / 1.65 x 1.3in Circuit Board Material: Fiberglass Working Voltage: DC 5V Package List 1 x Analog Electronic Candle Making Kit