Crouching Bones is approximately 36 inches tall and he has three operation settings - ON: This setting allows the prop to run continuously, SENSOR: This setting allows the prop to be activated when the infra-red sensor is activated. The infra-red sensor will activate when someone comes within an 80 degree angle, from left to right, as well as from above and below. The infra-red sensor has a range of up to 2 meters or 6.56 feet and can work in all lighting conditions from bright light to no light. OFF/TRY-ME: This setting allows the prop to be activated by the step here foot pad. The step here foot pad and a A/C adapter are included with the prop, also it has a volume control knob. Crouching Bones disassembles for easy storage. This prop is intended for indoor or sheltered outdoor use.