Test Button checks all functions by electronically simulating smoke conditions, causing unit to alarm 85dB Horn provides loud, audible warning Unit resists closing unless battery is inside Low-battery warning 10 Year Limited Warranty Long-Life Lithium Battery included 4000LB Cat. No.
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CABO. Model 4000LB is designed to give reliable early warning of fire by providing an 85dB alarm when the unit senses smoke from fire. 4000LB is powered by a replaceable long-life lithium power cell which carries a 10 year limited warranty. The unit features an ionization sensing chamber which operates on the ionization principle, a generally more effective method of detecting smoke from fast flaming fires.