supply of signal aspect led signal unit, 110v ac with health monitor alarm unit having lamp proving output to drive led lamp proving relay, the complete unit conforming to rdso specification no. rdso/spn/153/2004 revision 3 or with latest amendment or to the latest specification of led signal aspects and technical specifications. supply of led signal unit route aspect as per rdso spec. no- rdso/spn/153/2011.(rev.4.1) or latest.signal aspect led signal unit, 110v ac with health monitor alarm unit having lamp proving output to drive led lamp proving relay, the complete unit conforming to rdso specification no. rdso/spn/153/2004 revision 3 or with latest amendment or to the latest specification of led signal aspects and technical specifications. supply of led signal unit route aspect as per rdso spec. no- rdso/spn/153/2011.(rev.4.1) or latest.,signal aspect led signal unit, 110v ac with health monitor alarm unit having lamp proving o utput to drive led lamp proving relay, the complete unit conforming to rdso specification no. rdso/spn/ 153/2004 revision 3 or with latest amendment or to the latest specification of led signal aspects and tec hnical specifications. supply of led signal unit route aspect as per rdso spec. no- rdso/spn/153/ 2011.(rev.4.1) or latest. [ warranty period: 30 months after the date of delivery ] ]