Vandal-resistant speakers designed for hands-free two-way communications. Each consist of a 3-inch, weather resistant, cone-type speaker and a 25V transformer. A call-in switch mounted to a heavy-gauge stainless steel plate. The call-in switch can be wired to provide either momentary or latching operation. The plate may be mounted to a 2-1/2" deep Gang Box (4-1/2" W x 6-13/16" H),such as Steel City (H2BD-3/4 &1), with one-way security screws.