Loud alarm helps keep unwanted intruders out of your room .4M 4900 intruder alarm robot kit build your own alarm robot and hang him on the door knob to alert you to intruders. It teaches how circuits work and other stem based concepts. The loud alarm helps keep unwanted intruders out of your room. It includes parts to build alarm robot and instructions. It requires one aa battery (not included). It keeps any unwanted intruders out of your room.
Includes parts to build alarm robot and instructions
Requires one AA battery