... alarm system 1.certificate:ABS,BV,CCS,etc. 2.material:stainless steel 3.sensor:pressure 4.low cost water ingress alarm system The ... product is admitted bu classification societies as following:ABS, BV, CCS, CR, DNV, GL, KR, LRS, NK, RS SAVE YOUR INSTALLATION ... are needed for installation and lower cost for the whole system,which only needs one 4*1mm² cable from wheel house ...