with its advanced active shutter technology. Features: Support all DLP-LINK projectors, providing you a lot of choices. An optical communication method, work without the emitter. Work about 40 hours with a full charge, low power alarm. Five seconds after the loss of signal will enter standby mode, power saving. LED indicator light flicker to prompt operation, operate easily. Left and right eye switch are possible. Note: 1. GL1800 3D glasses should work with DLP-LINK 3D projectors, then you can enjoy realistic, vivid 3D images. Please confirm your 3D projector support DLP-LINK 3D function. 2. Please read the User Manual carefully before using the 3D glasses. 3. GL1800 3D glasses doesn't work with 3LCD projectors. Specifications: Model Number: GL1800 3D Glasses Type: Active shutter glasses Synchronous: DLP-LINK Display Compatibility: DLP-LINK 3D projector Frequency: 96 / 100 / 120 / 144Hz Response Time: 2.0 ± 0.5ms Contrast: 1000 : 1 ± 200 Transmission: 38% ± 2% Battery Type: 3.7V / 45mAh rechargeable lithium-ion Battery Life: about 40 hours Charge Time: 2-3 hours Dimension: 60 * 60 * 47 mm Net Weight: 35g / 1.23oz Environment Temperature: 0 °C - 45 °C Relative Humidity: 20% - 80% RH Atmospheric Pressure: 86 kPa - 106 kPa Color: Black Package Size: 17.6 * 8.1 * 5.5cm/ 6.93 * 3.19 * 2.17in Package Weight: 143.3g / 5.05oz Package List: 1 * GL1800 3D glasses 1 * Nose piece 1 * USB charging cable 1 * Cleaning Cloth 1 * Glasses Bag 1 * User Manual (Chinese & English)