... - alarm card work with pc dvr system - 8ch sensor alarm inputs - 4ch alarm relay outputs - With built-in Watchdog feature OverviewAlarm ... is "dead".ModelAlarm-0804: alarm card, supports 8 sensor inputs and 4 alarm relay outputs, with built-in watchdog function ... .Features - 8-channel alarm inputs, 4-channel relay outputs - With built-in Watchdog feature - ...