Walkera Goggle2 FPV Video Glasses with Head Tracking System Brand Name:Walkera . Item Name:Walkera Goggle2 Video Glasses . resolution:actine array 3x640x480pixels . Pixel Size:14.1um*14.1um/color dots pitch . Project size display:9.0mm x 6.8mm(diagonal 0.44inch) . Virtual image size:72inch(2 meters distant) . Field angle(FOV):32 . Exit pupil:25mm . Distance of exit pupil:30mm . Adaptable power range:DC 7-12V . Size:170 x 77 x 44mm(length x width x height) . Weight:165g . Working environment:0?-45? . Storage environment:-20?-70? . Features: Built-in 5.8G,B Band,8 channel receiver. . It can be used as standard AV signal output end. . It can turn all the composite video(NTSC/PAL) to VGA(60Hz) signal mode. . The pupil distance is adjustable. . Insert head tracking system. . Center distance can be adjusted.*High-tech precision optical components,prevent visual fatigue design. . Human body engineering design,light and easy to carry, wear comfortable. . Package includes: 1 x Google 2 glasses. 1 x Battery box. 1 x Antenna. 1 x Mushroom antenna. 1 x AV wire. 1 x User Manual. 3 x Data Line(3 pieces)