The Elmdene ELM 300 is a High Quality Internal Siren unit, housed in a rugged 1.2mm powder coated steel enclosure.
The electronic components are totally contained within the enclosure to protect against harsh environments.
The units have full electromechanical tamper monitoring, twin piezo sounders, full SCB functions backed by 2 x 6 volt batteries, and a ten minute cut off timer.
The 'Inter' range of polycarbonate sounders is available in three versions, each of which can be supplied with or without an internal battery for SAB or direct operation.