SainSonic DasGut GX 144Hz 3D IR Active Rechargeable Shutter Glasses for Acer ViewSonic BenQ Vivitek Optoma 3D DLP-Link Ready Projector Black New generation 144Hz refresh rate: ahead of other 120Hz products level Perfect match with 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: Rechargeable, 3 hours recharging for 50 hours operation. Auto POWER OFF function as well as super care ABS