The Intruder Trap System are 3 linked hi-tech traps! Protect your room and your important stuff. Startle the enemy with trap #1 when the light and sound alarms go off! Stun them with trap #2 when 2 darts shoot out to stop intruder in his tracks! Cat them with trap #3 when they set off the tripwire and loud siren goes off - busted! When #1 goes off, it arms the other 2 - bait them and catch them! Includes 4 darts. 7 AAA batteries required.