Check the listing for details. Fengmi Formovie Fast Refresh Rate Of Shutter Type 3D Glasses. Condition: New. Listed at 46.35 USD. Main Features:Cool look, lightweight designSmart switching, one-button correctionHigh-end smart chip, long-distance transmission without frame loss, up to 8 meters40mAh built-in LiPo battery, 40 hours battery life, boot 5 minutes without synchronization signal automatic shutdown energy savingMulti-mirror, compatible with sight glassesNote: for Mijia 4K laser TV, Mijia Youth Edition projector, and fengmi Laser TV 4K cinemaSpecifications:Contrast: 1000:1±20%Synchronization frequency: 96/100/120/144HzWorking temperature: 0-45 °CStorage temperature: -10-60°CPower supply mode: rechargeableLight transmittance: 38%±2%Room temperature environment react speed: 2ms ± 0.5msViewing angle: 30° (L/R 15°)Synchronization method: white light DLP-LINKWorking humidity: 20-80%Best viewing distance: 2-7 meters (under darkroom conditions)Battery: 40mAh LiPo batterySpecificationGeneralBrand: fengmi Model: FM3DG2 Material: ABSDimensions and WeightProduct weight: 0.0345 kg Package weight: 0.1700 kg Product size (L x W x H): 13.00 x 13.00 x 3.00 cm / 5.12 x 5.12 x 1.18 inches Package size (L x W x H): 16.00 x 8.00 x 7.00 cm / 6.3 x 3.15 x 2.76 inchesPackage ContentsPackage Contents: 1 x Pair of 3D Glasses, 1 x USB Cable