• Fixed temperature model (FST-951) factory preset to 135°F (57°C)
• Rate-of-rise model (FST-951R),15°F (8.3°C) per minute
• High-temperature model FST-951H) factory preset to 190°F (88°C)
• 360°-field viewing angle of the two visual alarm indicators, LEDs blink red in Normal condition and turn on steady red in Alarm
• LEDs blink every time the unit is polled