Max 150inch Large Image ,9 times larger than 50inch TV.10Year Life-No Future Cose (LED 30,000Hours ,If use 10hours per day ,it can use 3,000days).It is 2GB+16GB,Run Quicker.It supports 4K and Wifi Display to Smartphone.It has 48 languages .(Other Projector with Built-in Android OS is Old Android 6.0 ,1GB+8GB, Run Slow,Do not Support 4K)Optical specifications● Display type: 5.2inch LCD● Light source: LED, 30000hours long life● Brightness: 300 ANSI lumens● Contrast Ratio: 10,000:1● Resolution: 1920*1080 Full HD● Aspect Ratio:16:9/4:3● Throw Ratio: 1.32: 1● Projection size: 50-150'' (Suggest 60-120 '')● Projection distance: 1.2- 4.38mInterface● HD 1.4 *1● USB (Support read Data from USB SSD Hard Drive) *2● AV *1● Audio-in (3.5mm Headphone jack) *1● Audio-out (3.5mm Headphone jack) *1Others specifications● Projection Mode: Front/ Rear/ Ceiling front/ Ceiling rear● Keystone Correction: Manual● Power consumption: 90W● Device: 230 x 170 x 65mm● Weight: 1.3KGOptional● K18Built-in multimedia system, no Android system ● K18 add TV box: Android TV box :OS: Android 10.0 OSCPU: Allwinner H3 Quad-Core(1.5GHZ),4K HD DecodingMemory: DDRIII 2GBFlash: 16GBWiFi: 802.11 b/g /nWireless display for smartphone/tablet