Contrast: 3000:1 Projection lens: high light transmission multi-coated glass lens Keystone correction: plus or minus 15 degrees Input interface: dual USB/HDMI/VGA/AV/headphone jack Power input: 100V-260V (±10%) 50/60HZ Throw ratio: 1.4:1 Image ratio: 4:3/16:9 Projection method: front projection / ceiling projection / rear projection Focusing method: manual focusing Projection screen size: 30-200 inches Machine power: 70W Light source life: more than 2W hours Overall size: 25x 17x 8cM Bare metal net weight: 1.28KG Speaker: 4Ω3W Language: Support multiple languages Operating System: Multimedia/LINUX Processor: MST TSUMV66 Wireless technology: WIFI 802.11B/G 2.4G Remote control direct selection: support OSD screen display, support infrared remote control Working noise: less than 25DB Boot mode: slide cover to boot