Tender For custom bid for services comprehensive annual maintenance contract of av meeting system with all accessories-camc (comprehensive annual maintenance contract) of 50" ips panel , led display, 4k smart resolution 3840 x 2160 (uhd), dynamic contrast ratio 1000000:1, audio output 10w + 10w, speaker system 2.0 ch, smart webos 5.0, gallery mode, web browser, cp app, magic remote compatibility (ready, mrxx), mood display, soft ap, wifi (802.11ac), screen share (miracast), smart share (dlna), bluetooth audio playback, sound syn+b3c / bluetooth, voice recognition (standalone / solution), iot, usb cloning si compatible (tv link tuner, rs232c), ir out (hdmi, rs-232c), anti-theft system (kensington lock) nos. 2, 2 camc (comprehensive annual maintenance contract) of 12 hdmi signal outputs. it can control up to 12 units of splicing screen, and it can also control 8 independent screens. also it should independently adjust the color of each output, which can reduce the color difference between each screen. single switcher can support up to 8 layers from the same or different signals to be displayed at the same time. these layers can be displayed across screens and be arranged arbitrarily. special effect switch when switching signal, users can choose fade-out effect or quick direct switching each image can be freely zoomed and arranged. images can overlap each other. supports saving the configuration of the layout as a preset. the user can save up to 32 presets support 8 layers display at the same time, the position and the size of the layers can be adjusted arbitrarily. supports output mapping. supports output color calibration, which can reduce the color difference between each screen inputs: dvi-u*8, compatible with dvi, hdmi, vga, cvbs outputs: hdmi*12 control ports: rs-232 db-9 *1 rj45*2 nos. 1.