JGmax New Lightweight Rechargeable Shutter Glasses for 3d Dlp-link Projectors, Tv and Hdtv - Acer, Benq, Viewsonic, Optoma, Sharp, Mitsubishi, Sony,Panasonic,Vivitek 1 in pack,Compatible with all DLP-LINK 3D Projectors Improved Design: Portable,Light Weight and Comfortable for long time wearing. Better Viewing: Wider vision making the viewing experience Superior. Green consumption: Recharge with micro USB cable.2 hours recharging provides more than 20 hours viewing. Easy Operating: Simple One Button Operation w/ Auto Shut Off, detailed user manual attached.