Features: 1.DLP Link: This 3D active shutter glasses compatible with all DLP Link projectors, suitable for Vivitek, for LTV 2500, for LTV 3500, for Vanish TV projectors etc. 2.Active Shutter: This DLP link 3D glasses features active shutter technology with fast 144Hz refresh rate, which ensures high definition without ghosting images and flickering. 3.Left/Right Eye Rotation: If you have our 3D active glasses on and don't see the effect of 3D, just need to click the "Power Button" again to flip the left and right eye views for synchronizing. 4.Simple Setting: This DLP 3D glasses can be easily set via few simple steps for a immersive viewing experience. Rechargeable battery supports up to 45 hours continuous work and 180 days standby time. Auto 5 seconds stand by and 5 minutes shut off. 5.Light Weight: This projector glasses in light weight is portable and comfortable to wear. Comes with Micro USB cable, glasses cloth, a storage bag. specification:Item Type: DLP Link 3D Glasses Material: PC, LCD Color: Black Battery Model: 2 x 80mAh Polymer Lithium Battery (Inbuilt Battery) Transmittance: 38%2 Contrast Ratio: 1000:1200 Synchronization Frequency: 96/100/120/144Hz Synchronization Mode: White Light DLP Link PackageList:2 x DLPLink3DGlasses 2 x USB Cable 2 x Glasses Cloth 2 x Storage Bag 2 x User Manual