Feature:1. *Support all DLP-LINK projectors, providing you a lot of choices.2. *An optical communication method, work without the emitter.3. *Work about 50 hours with a full charge, low power alarm.4. *Five seconds after the loss of signal will enter standby mode, power saving.5. *LED indicator light flicker to prompt operation, operate easily. Left and right eye switch are possible.Specification:Features:*Support for DLP-LINK projectors, providing you a lot of choices.*An optical communication method, work without the emitter.*Work about 50 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.Notes: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.Specifications:Model Number: GL21003D Glasses Type: Active shutter glassesSynchronous: DLP-LINKDisplay Compatibility: DLP-LINK 3D projectorFrequency: 96 / 100 / 120 / 144HzWorking Current: 1.7mABattery Life: 55±5hrWorking Temperature: 0 - 45Storage Tempereture: -10 - 60Power Supply: 3.7V / 80mAHGross Weight (include the battery): 32.3g / 1.14ozTransmission: 38% ± 2Response Time: 2ms ± 0.5msView Angle: 30°(L/R 15°)SYNC Operation: White light DLP-LinkWorking Humidity: 20% - 80% RHAtmospheric Pressure: 86 kPa - 106 kPaColor: BlackPackage Size: 17 * 7 * 5.5cm / 6.69 * 2.76 * 2.17inPackage Weight: 121.8g / 4.3ozPackage List:1 * GL2100 3D glasses1 * USB Charging Cable1 * Cleaning Cloth1 * Glasses Bag1 * User Manual (Chinese & English)Package List:1 * GL2100 3D glasses1 * USB Charging Cable1 * Cleaning Cloth1 * Glasses Bag1 * User Manual (Chinese & English)