Display technology :dlp Android systerm :android 5.1 Build-in memory :1g/16g Miracast /airplay:yes Wifi : dual 2.4g/5.8g wifi Bluetooth :bluetooth 4.0 Brightness :800 ansi lumens Resolution :native 1280 x 800, 4k, 2205p supported Contrast :20000:1 Light source :led Lamp life :more than 50000 Image size is 65inches at 0 projection distance Image size is 100inches at 0.23cm projection distance Features of our handhold led dlp smart projector sm4: *supports bluetooth, android and ios mobile phone / tablet, game machine, dvd and other media equipments *with easy wireless screen function, perfectly applied to business office, home theater and intelligent interactive system *2.4g/5.0g dual-band wi-fi makes signal stronger and more stable, rich color saturation with high resolution and brilliant image *dlp technology (from texas instruments) has better colors and rich images *with built-in precise dmd digital lings processing chip and wide color gamut rgb primary colors led, no radiation, no harm to the eyes *native 1280 x 800, 4k 2205p ultra-high clear *support 3d, enjpy home theater *two parts designed, easy for parting and taking, bottom has power bank function for charging *above 50k hours of life, energy-saving design *support airply and miracast Our handhold led dlp smart projector sm500 is suitable for: 1.Presentation tool. Study tool for school students for presentation in class, and also for office meeting, wireless connect The mobile phone, tablet pc, ipad, netbook, pc 2.Home theatre Big screen movie watching, tv, video game playing. 3. Entertainments Travel, camping outside, party in your garden etc entertainments. 4. Holiday season gift promoting