Audio&Video formats: 3GP, MP4, MP3, MIDI, AVI, WMV, RMVB and etc(all common formats) Music play: MP3, WMA, ape, flac, aac, ogg, ra, MIDI etc Play Image formats: JPEG; BMP; GIF files Memory: Built-in 8GB (Max), extendable for another 4GB Data transmission: USB 2.0 Optical technology: 3M Mobile LCoS optical engine Lamp: 3M lamp Light source: Red/Green/Blue LED, 20000 Hours Aspect ratio: 4: 3 Luminous flux: 10 lumen Resolution: 640*480 (video) Contrast ratio: 1000: 1 Projection picture size: 6"~50"(inch)(15~127cm) Projector distance: 25~180cm Zoom & focus: Manual focusing Projector source: External, three in one AV jack, built-in memory or memory card Audio tweeter: Stereo Memory slot: TF card Supportable power: USB A/C adaptor, built-in rechargeable Li-ion batteries Operating environment: 0~35 degrees Size: W60 x L110 x H16.5mm Service life of lamb (hour): >2, 0000 Hours Rated power waste (w): 5 W