tender for annual maintenance of office building in sector-13p, hisar 2026-27. supply and installation of video conferencing speakerphone with 2 extension mikes the features of frequency range 100 hz to 22khz. use nos i nos. speaker gain control max: 92db. noise reduction 18db. speaker output 92dba providing and fixing of speakerphone with extension mikes of frequency range 100 hz to 22 khz built in aec, agc ans acoustic echo cancellation. automatic gain control, and acoustic noise make: peoplelink with warranty period as per manufacturer in office building sector 13p hisar and all other works contingent thereto.