Today I installed RadioShack pn 273-057. Piezo buzzer, 108 db. Works and sounds factory for the most part. Press unlock, two chirps, each time the chirps are a bit different, due to the cycle in which the buzzer is on. Press lock, get one chirp, again sometimes they are a little different depending on cycle last chirp was stopped. Holding truck release button for approx 3-5 seconds, panic mode is activated, and give off incredible alternating sound volume. After 30 seconds panic mode will reset itself as not to kill battery. Mounted is same spot as others, and 108 db is way loud enough and not be obnoxious. Good one!
Last edited by sfcjetjr; 09-22-2012 at 02:24 PM.