SainSonic 3D Active Shutter Glasses 10M 144Hz Rechargeable Infrared for Acer ViewSonic BenQ Vivitek Optoma 3D DLP-Link Ready Projector (3 Pack, GX Black) Using new generation 144Hz technology, ahead of other 120Hz products level Perfect match the DLP-Link Projector with the logo of 3D DLP Ready Fashion Design: Beautiful color, portable and comfortable. Light weight for long time wearing. Green consumption: Recharge with micro USB cable 3 hours recharging provides 50 hours operation. Automatic POWER POWER OFF function: When 3D projector is powered off or not synchronized with 3D signal,3D glasses will be AUTO powered off after 30 seconds.