The MA-1 Alarm system is a multi alarm monitor. For your convenience, the MA-1 can simultaneously monitor up to ten TA-2 alarms. Individual cables connect the TA-2 alarms to the Master Alarm box of the MA-1. The only power requirement for the MA-1 is 110 Volts A/C. This unit is powered by an intrinsically safe, low voltage (16 volt) power supply located outside the safety perimeter. For added surveillance the MA-1 can interface with a flashing strobe light and siren. You won't risk missing an alarm with 123 decibels alerting you!