Features: RTR Version Stirling model, no need to assemble, unbox the engine model and get ready to see the wonders of science. Comes with Color LED lamp string for you to diy and discover more fun. Well-made Stirling Engine Mode: The whole body is made of high quality aluminum alloy with finishing process. Burly beech wood base and sponge anti-slip pads at the 4 corners. The flywheel of a dollar glyph is enough to decorate your desk. Easy to Operate: Fill the alcohol burner with your 95% alcohol (we recommend this fuel) and light it. Let the light burn the round ended cylinder for about 60 seconds, then give the wheel a gentle push. Superior Performance: The Stirling engine equipped with a LED. As the power will go through the wire and drive the LED light to lit. When the model keeps rotating, the speed is high, the performance is stable, and the rotation can be maintained for a long time. Great Educational Toy: Classroom or laboratory experimental teaching aids, the best choice gift for students, teachers, children, friends and colleagues. Specification: Model: LL-006-BR Main Material: Wood, Aluminum Alloy Size: 17.4 x 8.4 x 9.8cm Weight: 295/10.4oz Package Size: 20 x 11 x 13.5cm Package Weight:560g/19.7oz Notes:Please allow 0-1cm error due to manual measurement. Thank you for your understanding. Packing list: 1 x Engine Model 1 x Alcohol Lamp Bottle 1 x Alcohol Dropper(3ml) 1 x Spare Heating Tube 1 x Led Bead 1 x LED Bead Bar Strip 1 x Extra Rubber Band