Tender For corrigendum : providing of design installation and maintenance of educational lab - smart class lab; site preparation, supply and installation of hardware, maintenance of hardware - integrated audio system , 120 w mixer amplifier (qty: 5) , dual channel microphone (qty: 5) , 86" uhd interactive board cum display (qty: 5) , sitc of digital podium (qty: 5) , main cabinet system- , computer system (amc/cmc); buyer