Features: Using the Hall electromagnetic principle, it can generate magnetic field changes. DC5V power input, colorful LED lights, cool and stylish. Unique electromagnetic swing experimental kit that showcases electromagnetic principles and enhances learning interest. DIY welding and assembly exercises to help improve welding skills and cultivate hands-on practical abilities, suitable for DIY enthusiasts and students. Simple and easy to understand assembly process, suitable for beginners to learn and explore the fun of electronic technology. Specifications: Material: PCB+ABS Type: Set, Set with Power Cable(optional) Finished product size: approx.164x99x59mm/6.46x3.9x2.32inch Circuit board size: approx. 50x41mm Working voltage: DC5V Package Includes: 1Pc Electromagnetic Swing Experiment Kit with/without Power Cable(optional) note: The shipment is in loose part and requires your manual assembly! Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.