Spy Gear - Door Alarm The Spy Gear Door Alarm lets you protect your room by sounding an alarm if anyone intrudes. Create your own secret code and be the sole key holder so only you can deactivate the alarm. The Door Alarm uses two unique pieces: one attached to your doorframe, the other to your door. The Spy Gear Door Alarm is made for spies ages 6+ and requires 2 x AAA batteries for operation (not included). Includes: 1 Spy Door Alarm, 1 Security Key, 1 Instruction Guide, 6 Adhesive Strips