Hindotech 144hz Rechargeable 3D Active Shutter Glasses for All 3D DLP LINK Projectors(BenQ,Acer,LG,ViewSonic,Vivitek,NEC,Optoma,Sharp,Dell) Support 96-144hz refresh rate Work for DLP-LINK Projectors without external 3D emitter Easy Operating: Simple One Button Operation / Auto Switch Off Rechargeable battery providing up to 40 hours operation. Super light weight,fashion,convenient and comfortable wearing