Diy Simple Dc Electric Motor Model Assemble Kit -physics Science. Features: Manual Installation Allows the User to Understand the Main Structure of the Electric Motor. Verify the Relationship Between Rotor Rotation and Current Direction and Magnetic Lines. Master the Principle of Motor Operation. DC Electric Motor Experiment: Input 3V - 6V DC Through Wires and Terminals the Coil Will Rotating and Speed Up when Voltage Step Up. To Avoid Short Circuit Two Electric Brushes Never Contact the Commutator Segment. Its Working Voltage is DC 3.0V-6.0V. And DC12V is Not Recommended. Specification: Working Voltage: DC 3.0V-6.0V; Application: Used to Study Magnetic Lines of Force; DIY Manual Practice; School Educational Project; Creative Gift. Magnet Size: 22x20x20 Mm (0.86x0.79x0.79 Inch); Magnetic Flux Density: Greater or Equal to 72mT; Operating Temperature: -20~70; Operating Humidity: 5%~90% RH; Material: Plastic + Metal + Copper Package Content: 1* Motor Model Only the Above Package Content Other Products Are Not Included. .