DA391, 12V DC (13.7) PSU, 1 X 4A Fused Output, Metal Cased Enclosure Dantech Dantech Electronic Engineering. Specialists in the design and manufacture of electronic equipment for the security industry. Dantech Website PRODUCT DATA SHEET FOR DA391.pdf£55.49DetailsDescriptionDANTECH DA391 DA391, 12V DC (13.7) PSU, 1 x 4A fused output, will house and charge one VRLA battery up to 7Ah capacity. Typical uses are for powering door access controllers, electric releases, maglocks and CCTV cameras. Metal cased enclosure.