Spy Labs: Invisible Tripwire AlarmCreate a top of the line, 360 degree security zone in your room! Secrets have never been safer than with this Spy Labs security system. Activate the LED beams in the two transmitters with a push of a button, then align the light beams with the receivers on the base station to create an invisible tripwire. When the barrier is breached or interrupted, the alarm sounds and the interloper is revealed! The transmitters can be placed up to six feet apart