GL1800 3D Glasses For DLP 3D Projector UFO P19 P20 U30 U70 U50 U90 R17 R19 R20 DLP-Link Active Shutter Real 3D Shocking Don't support TV 3D Built-in high-capacity rechargeable battery Auto power-off function, energy efficiency. Rechargeable, Micro-USB, more convenient. User-friendly electronic circuit design One single button, easy operation. Cool appearance, light design, comfortable to wear without dizziness. High-speed response of high-quality liquid crystal lenses, prevent from eye strain. The appearance of innovative treatment process, to eliminate electromagnetic interference. The frame using ABS + PC material, low energy, low carbon and environmental protection. High permeability rate of perfect quality, no flash smelting, no blur. With auto Power-off function, stability, energy-efficient Low-power self-detected function, low battery LED flashes to prompt the user when the battery is low. Technical specifications: Charge time: 2-3hours Continuous use: 50hours one time Field frequency: 96Hz-144Hz Transmittance:38%±2% Don't support TV 3D Cleaning cloth and glasses bag come in random colors, Not accepting designation color: Black Material: ABS+PC+LCD lens Note: Depending on the light, the color of the glasses lenses may be different from the picture, but this does not affect Package Contents: 1 x 3D Glasses 1 x USB charging cable 1 x cleaning cloth 1 x Glasses bag Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.