As of December 2018, more than 70% of theaters in mainland China that have been upgraded to laser projection use ALPD® 3.0 technology (source: CineAppo). 2.4K Picture: Test report from China Electronic Standardization Institute (CESI), report no. CESI201812240006-103. 3. Contrast: From Shenzhen Academy of Metrology and Quality Inspection, report no. WT188006766. 4. Proportion of red light: From Shenzhen Appotronics Corporation Ltd, report no. RE020181123G006. 5. Adjustable picture size 40–200"; recommended picture size 80–150" 6. A purchase of the set is needed for the projection screen 7. Picture display size 2214 x 1245 mm, projector screen size 2234 x 1265 x 6 mm. 8. Ambient light blocking = 1 - reflective brightness × π/center vertical illuminance of projection screen in bright room conditions. Test data from FSCREEN Laboratory. 9. Distances are approximate and may differ from the actual distance. Adjust for actual dimensions. 10. Light source brightness: From Zhongjian Group Nanfang Electronic Product Testing (Shenzhen) Co., Ltd., report no. SET2018-14072; Picture brightness: From Shenzhen Academy of Metrology and Quality Inspection, report no. WT188006766, parameter floating label reference GBT28037 2011 Information Technology, General specification for projectors. 11. Dolby Virtual Surround and Human Sound Enhancement Technology: Official DOLBY and Dts technical certified, DOLBY certification no. 589915, dts certificate no. C237603. 12. Light source lifespan 25000 hours at an ambient temperature of 35°C and a current of 3.0 A, and 7500 hours of continuous operation, which refers to the time for the brightness of the IES TM-21 normalized light source to decrease to 50% of its initial brightness. Report no. RE020171226L007. 13. Mi Laser Projector 4K can connect to devices that support HDMI audio and video output. Traditional cable TV programs can be viewed by connecting Mi Box. This device cannot directly receive broadcast TV signals. 14. Low noise: From Shenzhen Academy of Metrology and Quality Inspection, report no. WT188006766. Product images are for reference only, please refer to the actual product.