A loop-powered sounder and visual indicator combined with a standard Intelligent mounting base which is used to signal a fire alarm in enclosed areas.- Two volume ranges (55-75dB(A) and 75-91dB(A))- Visual indicator flash rate of once per second- Synchronisation of ‘alert’ and ‘evacuate’ tones- Synchronisation of visual indicator flash- Individual and group addressing- Unique acoustic and visual indicator self-test- Built-in isolator