Feature: 1. DLP 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. 2. Widely Compatible: Support for Vivitek, for DLP LINK projector. (Not compatible with ordinary projectors, Bluetooth 3D projectors, TVs, etc.) 3. Fashion 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. 4. Outstanding 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! 5. Left 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: Li Battery (Built in) Capacity: 80 mA Light Transmittance: 38%±2 Correctness: 1000:1±200 Synchronization Frequency: 96/100/120/144Hz Rated Working Current: <1.2ma Synchronization Method: White DLP-LinK Parameters: Support Various 3D Technology DLP-LinK Projectors, for ZX4 H1, for G1 G3 X1, etc. (Does not support monitors, ordinary/infrared/Bluetooth 3D projectors, Ordinary TV). Package List: 2 x 3D Glasses2 x USB Charging Cable2 x Clean Cloth2 x Manual