Micro Stirling Steam Generator Engine 3D Magnetic Levitation Moon Lamp You can use it if

You can use it if your hand is smaller than this but when spinning fully extended it may contact your palm

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It means the movements are unique and follow different paths each time you spin

Frequency response range: 50Hz--20KHz

redness and allergies

Micro Stirling Steam Generator Engine 3D Magnetic Levitation Moon Lamp You can use it ifHow to use: Turn the flywheel by hand to see if it is smooth, and adjust the related screws not smoothly Check whether each sliding part is clean; Fill the alcohol lamp below two thirds; Ignite the alcohol lamp and put it on the front of the test tube. After about 1 minute, turn the flywheel and the engine rotates. The warm up time with the generator is slightly longer. Cautions: Do not touch the test tube and the metal connected to it to avoid burns.