● Heat rating: 57℃ (135F)
● Operated with single 9V DC block battery
● Extra loud alarm sound over 85dB at 10 feet (3m)
● Self-test button
● Battery missing indicator
● Low-battery warning indicator
● LED operation indicator
● Easy to installation
● Approvals: CE and RoHS
● Complies with EN54-5 standard
● Dimensions (L x W x H): Ø107 x 35 mm