Ideal for applications such as individual rooms, apartments, hotels/motels and offices with felid selectable settings for Temporal (Code 3) or continuous horn, the Series MH piezoelectric Mini Horns are compact electronic alarm appliances that are listed under UL Standard 464 for Audible Appliances in Public Mode Fire Protection Systems. The Series MH models provide a field selectable Continuous or Code 3 horn tone when connected directly to a fire alarm control panel. Delivering high sound output with low current draw, they can also provide a synchronized code 3 horn tone using the DSC sync modules, FS-250 panel, XLS panel, or PAD-3 power supply with built-in sync protocol. The Series MH Mini Horns can be mounted to any standard single-gang box using In/Out screw terminals using #12 to #18 AWG for fast installation and requires no additional trim plate required for flush mounting. Plugs are provided to cover the mounting screws and enhance appearance. Color choices of red or off-white. Designed to meet or exceed NFPA/ANSI standards.