1.9V battery operateted 2.Temperature trigger: 55+-5 3.low voltage alarm signal 4.product lift:5 years 5.sound above 85db

Heat alarm

Ceiling or wall mountingGives loud 85dB alarm sound.Humidity:10~85 Potential early fire detect and auto alarm;Temperature trigger: 55±5;Operation ambient: 0~609V battery included 

Product size: 107*107*37.5mm   Box Size:125mm x 110mm x 55mmWeight:0.22kgCarton size: 57.5cmx27cmx30cm   50pcs/ctnGW/NW: 11kgs/12kgs