# Photoelectric Smoke Detector Automatic drift compensation
# High/Low sensitivity trouble
# Easy-maintenance replaceable chamber
# Local test button (units with horn)
# Magnet activated test (units without horn)
# Optional built-in 85 dB horn
# Unique, non-contact sensitivity reading with hand-held FSD-100 test meter
# Built-in, fixed-temperature heat sensor option with an alarm threshold of 135°F (57.2°C)
# UL268 Listed for commercial and residential applications
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