POA122- Ex Audio Intrinsically Safe PTT Control Unit -- for PD795IS and PT790ExIntrinsically Safe PTT Control Unit, for PD795IS and PT790ExExplosion classification is ATEX (Ex ia IIC T4 Gb/ Ex ia IIIC T160°C Db) to be used in hazardous area ATEX Zone 0Find a dealerHighlightsFunctionsTechnical SpecificationsRelated Products PT790Ex PD795IS