The REVERE Power Master™ R300DS is a dual channel Siren Speaker mounted in a round housing. It can be flush wall mounted or surface mounted with the Revere R300SM adaptor. It features a dB rating of 100 at 10 ft. It has a “Quiet Touch” feature designed to lower the dB level where desirable. It is ideally suited for alarm signaling indoors and also outdoors in weather protected areas such as soffits, eaves, etc