Wheelock AES-DL1-WS-24 Category : Wheelock Depending on which set of inputs has power applied to it, the alarm will produce a different tone.
Wheelock ET-1080-WS-24 Category : WheelockYou can’t really tell from the pictures, but the strobe is practically falling out of this particular unit.
Amseco BZ-54VT+RSD-24L Category : AmsecoThat rubber band is holding the strobe to the unit since there are no screws keeping it secure.