Remote alarm panels are used to alert when signals from ozone and VOC monitors reach preset limits or set points. The alarm is a red strobe light and a loud audible alarm (90 decibels at 3 meters). There's also a digital reading of ozone in parts per million. RAP-2 also outputs its input signal in the form of 4.20 mA for use in building automation systems and other applications requiring long signal paths. RAP-2 is powered by 14-30 VAC or DC. This remote alarm panel is usually used with the C-30Z, C-30ZX, EE-2, and 0S-4. It can be used with other instruments by special order.