Specifications:

. This is a brand new emergency door release glass break alarm button
. The Door Alarm Button is made of durable plastic shell and easy to install
.NO, NC, COM connection
.Override electrical locking/release devices
.Use a double pole switch
.This Door Release Alarm Button is the best protector in home, shop and other places
.Size: 86 x 86 x 55mm/3.39 x 3.39 x 2.17in(L x W x H)