supply and pwcamc of uhf digital hand held trans receiver walkie talkies under buy-back scheme , supply , material code: 8550100024 - digital walkie talkies operating in uhf band , intrinsically safe , ip68 as per detailed specifications and scope of tender . , material code: 8560200324 - bidirectional amplifier operating in uhf band along with necessary accessories as per detailed specifications and scope of tender . , material code: 8550106404 - digital base station operating in uhf band along with antenna as per detailed specifications and scope of tender . , total supply value ( a ) , pwcamc , charges for post warranty comprehensive annual maintenance contract ( pwcamc ) for five years ( year wise ) after the warranty period including spare parts , consumables , etc . as per specification and scope of tender . the charges shall include to & fro fare , boarding & lodging charges , insurance , etc . , all inclusive for the service personnel . , 1st year , 2nd year , 3rd year , 4th year , 5th year , total of pwcamc ( b ) , buy-back ( ie minus ) - ( c ) , buy-back ( ie minus ) of walkie talkies - make - motorola , model-mtx960 , operating frequency range -uhf ( 800-880 mhz ) , type-analog intrinsically safe . year of purchase - 18 sets in 2013 and 237 sets in 2011