⊙ Power supply:DC 9V replaceable battery -
⊙ Conform to EN14604:2005/AC:2008
⊙ Alarm volume:≥85dB at 3m
⊙ Big test button for easiy weekly testing
⊙ Produce life time>10 years
⊙ Low battery signal alarm
⊙ Easy to install with mounting bracket
⊙ Safety clip feature,not allow mouting without battery installed
⊙ Size:Φ101mm *36mm