... 3D glasses: 1.USB rechargeable,or battery we have both 2.light weight,good looking 3.High quality,SYNC perfectly DLP Link glasses for 3D ... supply: CR2032 lithium battery or button cell -Battery working time: lithium battery , 40 hours;Button Cell, 210 hours;-Sync operation ... ,vivitek,bengq,acer ect, all 3d ready projectors. Description for DLP active 3D glasses:-Artistic design with elegance appearance ...