KIDDE conventional aritech alarm siren in polycarbonate at 24vcc / 5,1-41ma for indoor use. red, red flashing lamp. siren, beacon and control separated. wall mounting, output 85 to 97db (pulse alert technology). anti-tamper locking mechanism. 32 selectable tones, automatic synchronisation. adjustable volume control and flash frequency, low-profile timesaver base with all connections. dimensions 100øx100mm