Light weight, comfortable wearing. Specifications: Virtual screen: 72 inch virtual screen (2m away) Resolution: 300 * 224 Display: FLCOS (Micron) Levels: 256 Life time: 50000 hours Power consumption: 3.7v, 160mA Sound: Full stereo Working/Preserving temperature: -5 - 45℃ / -10 - 50℃ Working hours ( fully charged): iPhone- 4 hours, iPod touch-3.5 hours Apple Chip licence ID: 102085-0007 Color: White Safety Standard: CE, Fcc, Rohs Dimensions: 154 * 44 * 20cm (folded) Net weight: 55g Package size: 17 * 6 * 5.8cm Package weight: 195g Package Contents: 1 * 72" iphone video glasses 1 * Eye mask 1 * Pouch 1 * Glasses case 1 * USB cable 1 * User manual