#13 I've seen done by putting it under your chin and opening your mouth some. The guy proved it by pressing the button a bunch of times far away without it working. He then put it under his chin and opened his mouth and pressed the button again a few times and the alarm kept switching on and off then at the same distance.
Need a little help figuring out which side the exit is on? If the number is on the upper left-hand corner of the sign, the exit is on the left, and vice versa.
#13 I've seen done by putting it under your chin and opening your mouth some. The guy proved it by pressing the button a bunch of times far away without it working. He then put it under his chin and opened his mouth and pressed the button again a few times and the alarm kept switching on and off then at the same distance.