Khob lub teeb faib, Kev xaiv dawb ntawm cov reflectors kom phim lossis tsis ua kom tau raws li qhov xav tau sib txawv;High decibel ceramic buzzer nti thiab tshwj xeeb tsav tsheb nti tau txais yuav los ua kom ruaj khov thiab zoo nkauj zoo nkauj;Stainless hlau lossis yas bracket, uas yuav tsis xeb mus txog 3 xyoos.