SainSonic CX-30-A CX-30 3D Glasses Active 144Hz Rechargeable for All DLP-Link Projector & TV, SamSung, Benq, Acer, Viewsonic, Optoma, Sharp, Mitsubishi, Nvdia, Sony, LG, Panasonic, Vivitek, Dell, Nec - Black 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 35 hours operation. Easy Operating: Simple One Button Operation w/ Auto Shut Off, detailed user manual attached. We provide better customer service with 24*7 Email Support, feel free to contact us!