Dahua LCH75-MC410-B 75 Inches 4K Display Smart Interactive Whiteboard , Android and Windows Support, Multiple Devices Wireless Sharing, Network Support Touchscreen Monitor Built-in System Operating System of External Module Android 9.0 CPU Quad-core A55 CPU Frequency 1.9 GHz GPU Mali-G31 MP2 RAM 4 GB ROM 32 GB Function Applicable Operating Systems Windows 7/8/10; Android Wi-Fi Dual-band 2.4 Ghz/5 Ghz Wi-Fi Hotspot Dual-band 2.4 Ghz/5 Ghz; supports enabling hotspot and Wi-Fi at the same time LCD Panel Panel Dimensions 75-inch Backlight DLED Aspect Ratio 16:9 Brightness 75-inch: 350 cd/m² Resolution 3840 (H) × 2160 (V) UI: 1920 (H) × 1080 (V) Viewing Angle H: 178°; V: 178° Lifespan 50,000 hours Refresh Rate 60 Hz Static Contrast 1200:1 Camera Pixel 5 MP Auto Control Auto white balance Distortion ≤ 5% Max. Resolution Android: 1080p@30fps; OPS: 2560 × 1440@30fps Field of View H:84.5°; V: 54.0°; D: 93.1° Device Ports Light Sensor 1 Front Button 1 × Power button (right side) Front Ports 1 × USB 3.0 (left side) Network Port 1 × RJ-45 Wi-Fi 1 × Wi-Fi; 1 × hotspot USB 3 × USB 3.0; 1 × Micro USB RS-232 1 × RS-232 Video Input 1 × HDMI IN Audio Output 1 × 3.5 mm (Line out) Others 1 × Touch IrDA 1 Microphone 2 Touchscreen Touch Technology Type IR touch technology Response Time < 10 ms Touch Points 20 Valid Touch 2 mm Writing Mode Finger Stylus pen Touch Resolution 32767 × 32767 Number of Multi-user Writing Points 2 Speaker Power Full frequency: 2 × 15 W Built-in Speaker 2 Microphone Pick-up Distance Far-field sound pickup: 6 m–8 m (19.69 ft–26.25 ft) Number of Microphones 2 AGC Yes Echo Cancellation Yes Polar Pattern Omnidirectional Intelligent Noise Filtering YES General Power Supply 100–240 VAC, 50 Hz/60 Hz Power Consumption 300 W Operating Temperature 0 °C to 40 °C (32 °F to 104 °F) Storage Temperature –10 °C to 50 °C (–14 °F to 122 °F) Operating Humidity 10%–90% (RH) Storage Humidity 10%–90% (RH) Product Material Metal casing Protective Glass Anti-dazzle tempered glass with a hardness of 7 on the Mohs scale Casing Color (Frame/Rear) Bottom: Silver; top/left/right: black
