MOACC Newest Economical UNIVERSAL 3D Active Rechargeable Shutter Glasses for Mitsubishi, Samsung, Acer, BenQ, Optoma, Dell, Vivitek, NEC, Sharp, ViewSonic DLP Link /DLP-Link Projector and 3D Ready DLP HDTV -Red 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.3 hours recharging provides 50 hours operation. Easy Operating: Simple One Button Operation w/ Auto Shut Off, detailed user manual attached.