... box is working with PC DVR system to detect sensor input (like smoke sensor, intrusion detector) and control alarm relay outputs ( ... switch, alarm light, alarm speaker).ModelAlarm-1608: alarm box, supports 16 sensor inputs and 8 alarm relay outputs.SpecificationSpecification Alarm-1608Power Voltage ... 30Weight (kg)1.5 Application LV-AL1608, alarm box, supports 16 sensor inputs and 8 alarm relay outputs