Rechargeble 3D shutter Glasses for 3D TV also work with 3D Projector and CRT monitor: Application: *Used with Samsung® 3D TV with build-in IR emitter *View 3D content with120Hz 3D ready projectors *View 100Hz or higher CRT monitors when using with 3D Glasses Kit-S. Specification: ShutterLiquid CrystalField of Sync120HZContrast Ratia1000:1Weight39gSYNC OperationIRTransmittance38+/- 2%Battery TypeRechargeable Li BatteryBattery Operating Life24hours continuous working with one full chargeOperating ConditionWorking Temperature0°C to 40°CStorage Temperature-10°C to 75°C Packing Content: 1, Active 3D Glasses x12, Cleaning Cloth x13, Storage Pouch x14, User’s Guide x15, USB Charge Cable x16, Interchangeable Nosepiece x4