The distance between the barrel and the object in front of it is calculated by the time difference between ultrasonic transmission and reception. When an object is detected in front of it, the lid opens automatically. When the object is detected to leave, the lid closes automatically. Note: when the sensor object is 20CM away from the barrel, the lid will open and stop for 1 second.
Material: plastic, metal accessories, electronic components
Type: STEM toys, DIY kits
Suggested Age: 10 years and up
Batteries: 2*AA (not included)
Package: PE ziplock bag*
*Some orders are individually packaged in cartons, but this is not guaranteed.
Note: this is a DIY kit, you need to assemble it
WARNING: CHOKING HAZARD - Small parts. Not for children under 3 yrs.