bids are invited for display system -1.1 - 85 diagonal 4k resolution led display with builtin speakers , display system -1.2 - wall mount kit for above display , vc system & audio system -2.1 - unite 200 ptz camera with 12x zoom, shall have 72 deg fov, horizontal rotation range: ±170°, vertical rotation range: -30° to +90°. shall have built in uvc ptz, visca port for rs232 control, ir control with external control systems. shall have on board memory to store 250 preset positions and must be supplied with an ir remote control. shall support ms team, webex, google meet and other web conferencing platform. , vc system & audio system -2.2 - ceiling tile beam forming mic array (600mm x 600mm): true frequency invariant beamformer with unvarying gain response across frequency, software configurable beamwidths: small, medium and large; support wideband beamforming range from 100hz to 20khz. built in acoustic echo cancellation per beam and noise cancellation upto 25db with option to configure at an increment of 1db. microphone array shall have deep sidelobe down to 45db of depth and dynamic range: 20 hz to 20 khz, > 70 db. must have configurable beams: 6, 8, 10, 11, or 12 option. must have built in amplifier with 4channels x 15watts each @ 8ohms or configurable to 2channels x 30watts @ 4ohms , vc system & audio system -2.3 - power supply kit for bma , vc system & audio system -2.4 - 4 input digital signal processor with usb and analog tel line, distributed aec inputs, 8 mic/line outputs, usb audio, support 5 x voip line and pots interface, rs 232 interface for control. 1 x ethernet port, 4 x gpio port and 16 x 16 digital expansion bus , vc system & audio system -2.5 - hub that connects usb camera, usb audio, room displays and laptop , vc system & audio system -2.6 - converge pa 460 - 4 ch x 60 watts class-d audio power amplifier, with 4 ohm / 8 ohm mode or 70v /100v modes. bridged i/o supported for 70/100v mode and 120 watts output. half rack size unit. it does not include