The Kidde Cat. No. 278B/279B series non-coded fire alarm stations are contemporary styled Lexan® stations and are flexibly designed to meet a wide variety of application requirements and operational sequences. The Cat. No. 278B series are double action stations with terminals for field wiring connections. All types can be either pre-signal or general alarm and are available with single or double pole alarm contacts which can be normally open, normally closed or a combination or both. Either a key or tool (depending on station selected) is required to reset mechanism. For semi-flush mounting use a standard North American 4 in square box with a single gang plaster cover having an overall minimum depth of 2-1/4 in. For surface mounting use a Cat. No. K-276B-RSB surface back box.