SYSTEM SENSOR | HWL Fire Protection Horn, Indoor, Wall Mount, 12/24 Volt DC, ?5.6L x 4.7W x 1.25D (142 mm L x 119 mm W x 32 mm D), White is an add-on siren you can use with fire panels such as the Silent Knight Peak Output (dBA) 90 Standby Current (uA) 0
