Ideal for studying electricity.

• Allows you to connect up to 4 D cell batteries in series or parallel (comes configured in series, can be converted though - may require additional wires)
• Perfect for electronics, physics, or even biology experiments
• Batteries and cables not included
• Variable battery power supply

The variable power supply that hold up to 4 D cells is a great tool for use when studying electricity (Batteries and cables not included).