Features 1DLP LINK Projector 3D Glasses: Active shutter 3D glasses use "DLP Link" as the synchronization method, 144Hz refresh rate, compatible with all DLP Link projectors, improve the DLP Link projector sensing experience. 2Widely Compatible: Support for Optoma, for BenQ, for Acer, for Vivitek, for Dell, for Viewsonic, for Mitsubishi DLP LINK projector. (Not compatible with ordinary projectors, Bluetooth 3D projectors, TVs, etc.) 3Fashion Design: Beautiful colors stand out in the dark. Lightweight and portable, comfortable to wear for a long time. The 2 piece Package is suitable for double use or single replacement. 4Outstanding Features: DLP LINK 3d glasses use the latest active shutter technology, 144Hz ultra fast refresh rate, high definition, no ghosting, no flicker, providing you with an excellent 3D viewing experience! 5Left and Right Eye Rotation: If you wear our 3D active glasses and still can't see the 3D effect, just click the "power button" again to flip the left and right eye views for synchronization; very convenient. Specification Item Type: 3D Glasses Material: PC + LCD Lens Color: Black Battery Model: Lithium Battery (Built in) Capacity: 80 mA Light Transmittance: 38%2 Correctness: 1000:1200 Synchronization Frequency: 96/100/120/144Hz Rated Working Current: