Features 1.[High Refresh Rate] This for dlp link 3D glasses use the latest active shutter technology, ultra fast 144Hz refresh rate, ahead of other 120Hz or 96Hz products level. Give you a better experience. 2.[High Light Transmission Rate] Using less than 1.5ms response and light valve LCD lens, the light transmission rate is increased by 8%, high contrast ratio makes the picture appear clear, reduce ghosting, present lifelike 3D picture. 3.[Long Battery Life] This active shutter 3D glasses built in 90mAh rechargeable polymer lithium battery, long battery life, durable and environmentally friendly, once filled for 40 hours of continuous playback. 4.[Also Suitable For Nearsighted People] Our 3D active shutter glasses are designed for nearsighted people, they can be worn directly to watch 3D movies, and can be used with all kinds of nearsighted glasses on the market. 5.[Wide And Fast Compatibility] The 3D glasses use for DLP Link as their synchronization method to quickly work with all for DLP Link technology projectors. (It is not compatible with TVs). specificationItem Type: Active Shutter 3D Glasses_x000D_ Material: ABS, PC_x000D_ Field Frequency: 96, 100, 120, 144Hz_x000D_ Standby Time: 150 Days_x000D_ Acceptance Distance: Approx. 8m/26.2ft_x000D_ Contrast Ratio: 1000:1200_x000D_ Light Transmission Rate: 38%2_x000D_ Response Time: 2ms0.5ms (At Room Temperature)_x000D_ Charging Time: 2.5 Hours_x000D_ Duration: 40 Hours_x000D_ Applicable: For DLP LINK 3D Projector_x000D_ Built in Battery: Lithium Battery 90mah PackageList1 x_x000D_ _x000D_ ActiveShutter3DGlasses 1 x Charging Cable 1 x Wiping Cloth 1 x Storage Bag 1 x Instruction Manual