Feature: 1. Multi Color LED: The stirling engine motor model generates electricity due to the heat of high grade alcohol to drive multi color LED illumination 2. Aluminium Alloy: The baseplate of the stirling engine model is made of brushed aluminium alloy, the shell frame is CNC finished with sandblasting and an aluminium alloy flywheel 3. Reliable Material: The connecting rods of the stirling engine model are cut from stainless steel. The heating cylinder is made of thickened glass for long term heating 4. Simple to Operate: The stirling engine motor toy recommends 95% alcohol, let the light burn on the cylinder at the rounded end for about 60 to 120 seconds, then gently push the wheel 5. Scope of Application: Suitable as the science project gifts for children, physics and mechanical learning, teacher demonstration props, etc Specification: Item Type: Stirling Engine Motor Model Material: Stainless Steel, Aluminum Alloy, Glass, Log Color: Gold Product Size: Approx. 17 x 8 x 10cm / 6.7 x 3.1 x 3.9in (manual measurement has an error of about 1cm/0.4in) Output Voltage: 3.0 to 5.0V Fuel: 95% Alcohol. Package List: 1 x Generator1 x Tweezers1 x Alcohol Bottle1 x Alcohol Cover1 x Measuring Tube1 x Lampshade1 x Rope3 x Hex Wrench3 x Diodes4 x Circles1 x Tube1 x User Manual