MS Series remote accessories are designed for use with Air Products and Controls Duct Smoke Detectors in mind. They possess interconnection capability with all AP&C Duct Detectors. Accessories provide audible and visual (red and green LED lights) indication in addition to remost testing and reset functions. The brushed stainless steel allows for a sleek look while remaining durable. Products mount on a standard single gang electrical backbox with a pigtailed terminal connection.