BYSECUR 12v 4a power supply certified grade 3 large metal enclosure 400x300x90mm, 12v 4a output voltage, current-limited and short-circuit protected, battery charging output, 13.8 v p, for charging and individual monitoring of 2, 12v 18 amp. batteries, alarm outputs for mains failure, batteries, output voltage failure, general fault and tamper., enclosure made from 1.2 mm steel sheet with epoxy paint ral 7035, dimensions 400x300x90 mm