Xpand X102-XP DLP Link Active Shutter 3D Glasses with 1 Battery (Discontinued by Manufacturer) 3D requires as much light as possible. XPAND X102 Series features the fastest shutter technology for the brightest image XPAND X102 Series is optimized to work with DLP chips. To better manage battery life, the DLP-Link 3D Glasses Series glasses turn "OFF" automatically