Features: Features built in digital meter that clearly shows current, power and electrical data instantly, helping students understand Joule's Law visually. Great for physics lab demonstrations and interactive classroom learning with physics teaching tools. Made from robust metal and plastic construction to maintain stability with frequent use. Solves issues of traditional teaching tools getting damaged easily, ideal for long term educational applications with physics lab equipment. Designed with clear digital readouts and straightforward steps for teachers to conduct experiments smoothly. Works well for both beginner and advanced users, simplifying lab procedures with educational instruments. Supports various physics experiments from basic electrical concepts to complex circuit analysis, meeting different teaching requirements. Perfect for school and university physics classes with science education supplies. Works with 110V-220V electrical sources, providing flexibility for different classroom setups and improving functionality in various learning environments with physics demonstration devices. Specifications: Component: Metal Plastic Color: As picture shown Size: Approx. 40x30x4cm/15.75x11.81x1.57in Weight: Approx. 2600g Package Includes: 1Piece Digital Joule's Law Demonstrator Device note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color