Electrical Operating Unit The operation of electrical operating units is performed when an electrical signal is applied from the detection system to the alrm system and than alarm system to operating device in case of fire. The units discharge the aerosol through chemical combustion of fire wall Brand: Electrical Operating Unit, LEBIH AMAN KARENA MEMADAMKAN API TANPA MERUSAK PERALATAN ELEKTRONIK, KOMPUTER DLL. Product Type: Product Features: Product Specification: Hub: mia_ brsinaga@ yahoo.com ph 085691398333./ 021-40911748.