Rainproof

L-shaped angles are affixed downward to the top panel to prevent rain from the upper direction. At the rear of the body are components that should not be wetted by water, such as air intakes, power switches, and charging connectors. On a strong rainy day, the splash guard protects them from being hit on the ground and bouncing rain on these. To prevent insect infestation, sponge tape is applied to the tops of the front, rear, and side panels to make them airtight.

Against condensation

If the robot is left outdoors, condensation will form inside the robot in the morning on days with large temperature differences. When charcoal is placed inside, the charcoal absorbs excess moisture and condensation no longer occurs.