Scarab is a robot that makes use of two touch sensors
to detect obstacles. When its antennal (touch sensor)
detects an object in its path, Scarab will go backward
first and automatically follow a two-step maneuver to
help it overcome the obstacle, which can be a
combination of “Left Turn”, “Right Turn”, “Reverse”, or
“Stop”. The Scarab robot can be configured with
different sets of movements.

Specifications:

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Requires four (4) "AA" batteries.