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: GL2100 3D Glasses Type: Active shutter glasses Synchronous: DLP-LINK Display Compatibility: DLP-LINK 3D projector Frequency: 96 / 100 / 120 / 144Hz Working Current: £¼1.7mA Battery Life: 55±5hr Working Temperature: 0¡æ - 45¡æ Storage Tempereture: -10¡æ - 60¡æ Power Supply: 3.7V / 80mAH Gross Weight (include the battery): 32.3g / 1.14oz