ok thanks matt. i checked out that site...I really don't think i want to pay more than like 15-20 bucks per alarm so i was looking at these:
http://www.bigcarptackle.com/ngt-twi...set-on-blister
why are they so much cheaper than the other ones? do you know what you're paying for with the really expensive ones? I just need some that will alarm when the line goes out only no bells and whistles needed.