Feature 1 SUPERIOR PERFORMANCE: 3D glasses feature the latest active shutter technology, ultra fast 144Hz refresh rate, high definition, no ghosting images and no flicker, providing you with a great 3D viewing experience. 2 ONE TOUCH SWITCHING: 3D active shutter glasses support one touch left and right eye switching, which is very convenient and does not require the operation of a DLP projector. 3 LONG BATTERY LIFE: 3D active shutter glasses are USB rechargeable; the built in lithium rechargeable battery lasts around 3040 hours on a 23 hour charge. 4 WIDELY COMPATIBLE: 3D active glasses with excellent 3D effects, compatible with 96-144HZ and supporting all major brands of 3D projectors with DLP LINK technology (regardless of brand). 5 LIGHTWEIGHT AND PORTABLE: Active shutter glasses are lightweight, portable and can also be worn in front of regular glasses, making them very comfortable to wear for long periods of time.Item Type: 3D GlassesMaterial: Plastics, ElectronicsContrast Ratio: 1000:1 +, - 200Synchronous Frequency: 96Hz 100Hz 120Hz 144HzRated Operating Current: Less Than 1.2mAResponse Time at Room Temperature: 2ms+, -0.5msLight Transmittance: 38%+, -2%Viewing Angle: 30 Degrees (L R15 Degrees)Synchronisation Method: White DLP LinkBattery Type: Built in 3.7V 45mAh Lithium Battery (Included) Package List1 x 3D Glasses1 x Charging Cable 1 x Eyeglass Cleaning Cloth 1 x Carrying Pouch 1 x Manual