EST 757-7A-T Category : EST/Edwards Just a regular Integrity. Brand EST/EdwardsModel 757-7A-TManufacturer ESTType Alarm (Horn/Strobe, 4-wire)
System Sensor 2424 Category : System SensorThis smoke detector is sometimes referred to as the “doorknob” because of its doorknob-like appearance.
System Sensor MASS2415ADA Category : System SensorMASS stands for “Multi-Alert Sounder/Strobe.” As the name suggests, it can do more than one tone.