Brightness: 4600 lumens Contrast ratio: 5 million dynamic contrast ratio (5000000:1) Standard resolution: 1920×1200dpi (WUXGA) Type of light source: laser light source Projection ratio: 0.235:1 (short focus design) Noise: 37 decibels (normal mode) Display technology It adopts 3LCD display technology, supports manual focus, and the lens is made of all glass. Interface and extensions Video interface: HDMI 1.4, VGA Network interface: 100 megabit network port USB interface: support USB-A/B Audio interface: support 3.5mm headphone jack and RCA interface Calibration and adaptation It supports four-way trapezoidal correction (vertical ±30°, horizontal ±30°), but there is no intelligent obstacle avoidance or curtain adaptive function. Other features Power supply type: external power supply 1 Installation method: support table forwarding, lifting forwarding/backdroping and other methods 1 Warranty service: Provide a 2-year warranty, and JD platform goods enjoy 7-day return, 15-day replacement and warranty service.