Dahua LCH75-MC410-B 75 Inches Smart Interactive whiteboard

Operating System Android 14 CPU Quad-core A55 CPU Frequency 1.9 GHz GPU ARM Mali-G52 MP2 (2EE) RAM 4 GB ROM 32 GB NFC No Function Operating System of External Module Windows 7/8/10/11 Wireless Access Point YES IR Receiver 1 LCD Panel Screen Size 75 inch Backlight DLED Aspect Ratio 16:9 Brightness 350 cd/m² (typ.) Resolution 3840 × 2160 Viewing Angle H: 178°; V: 178° Lifespan ≥50, 000 hrs Display Color ≥72% NTSC Refresh Rate 60 Hz Static Contrast Ratio IPS: 1200 (typ.) Response Time ≤8 ms (typ.) Camera Camera Android: Photo: 48 MP; Video: 4 MP Windows: Photo: 4 MP; Video: 4 MP Auto Control Auto white balance Distortion ≤5% Max. Resolution 2560 × 1440@30 fps Field of View D: 88°, H: 79°, V: 51° Face Detection No Device Ports Light Sensor 1 Front Button 1 × power button Front Ports 1 × USB 2.0 Rear Port 1 × USB 3.2 Gen1 Type-A; 1 × USB 2.0 Type-A; 1 × Micro USB 2.0; 1 × DB9 male connector; 2 × HDMI 2.0 IN(4K@60 Hz); 1 × RJ-45; 1 × 3.5 mm Line out port; 1 × Touch port;1 × Type-C(USB 2.0 device 5 W charging) Wi-Fi Yes, 1 × Station, 1 × AP Wi-Fi Standard Station: 802.11b/g/n/a/ac/ax AP: 802.11b/g/n/a/ac/ax Wi-Fi Frequency Range 2400–2483.5 MHz, 5150–5350 MHz, 5470–5725 MHz, 5725–5850 MHz MAX Power Transmission (Wi-Fi) ≤20 dBm@2400–2483.5 MHz; ≤23 dBm@5150–5250 MHz; ≤20 dBm@5250–5350 MHz; ≤27 dBm@5470–5725 MHz; ≤14 dBm@5725–5850 MHz Bluetooth Yes Bluetooth Standard BR/EDR/BLE, BT5.2 Bluetooth Frequency Range 2400–2483.5 MHz MAX Power Transmission (Bluetooth) ≤20 dBm@2400–2483.5 MHz Others 1× Touch port Microphone 8 arrays Touchscreen Touch Technology Infrared Attachment Method Non-Lamination Touch Points Android: 32 points, Windows: 40 points Valid Touch 2 mm (0.1″) (over 90% touch area) Writing Mode Finger Pen (attaches magnetically) Touch Height ≤0.99 mm (Average) Anti-light Interference Anti-dazzle tempered glass Surface Hardness ≥9H Touch Resolution 32767 × 32767 Speaker Frequency 150 Hz–20 kHz Power 2.0 sound channel, front-end: 2 × 15 W Built-in Speaker 2 Microphone Pick-up Distance Long-range sound pickup: 8 m–12 m (26.25 ft–39.37 ft) Number of Microphones 8 arrays AGC Yes Echo Cancellation Yes Polar Pattern Omnidirectional Intelligent Noise Filtering YES General Show More Show Less