The Kidde SL177i is a 120VAC wire in unit that provides a visual warning when part of an interconnected system. This unit can be directly interconnected with Kidde smoke alarms, heat detectors and carbon monoxide alarms. When triggered by a smoke alarm or heat detector, it will produce a steady flash warning. When triggered by a carbon monoxide alarm it will produce an intermittent flash warning. The SL177i has a 5 year limited warranty and is UL Listed.

This product Kidde SL177i replaces Firex 240, Firex 240B, and Firex 250. Kidde SL177i combines with Firex 4518 replaces Firex 242 and Firex 243.

The Kidde SL177i, used in conjunction with a smoke, heat or carbon monoxide alarm, provides a bright visual signal to warn of a smoke, heat or CO hazard. The Kidde Strobe light benefits the hearing impaired, allowing a visual alert of a danger. This unit also includes a tamper resist pin that helps to deter thief and tampering.