Item Type: 3D GlassesMaterial: Plastic, ElectronicsOperating Mode: LCD ShutterFrequency: 96144HzTransmittance: 36% (TYP)Contrast Ratio: 1000:1Standby Time: 180 DaysCharging Time: 2.5 HoursContinuous Working Time: 45 HoursSignal Reception Distance: Approx. 8m/26.2ftBattery Type: Built in 45mAh Lithium Battery (included)Package List1 x 3D Glasses1 x Glass Cleaning Cloth1 x Charging Cable1 x Instruction ManualAll data are measured manually, and there are certain errors in the measurement results.1USB CHARGING: DLP LinK 3D glasses are USB charging type, just a data cable can give it a full charge, very convenient and fast. 2LONG LIFE TIME: 3D active shutter glasses built in lithium rechargeable battery, charging 23 hours can last about 3045 hours, long life time. 3COMPATIBLE: 3D glasses 3D effect shocking, compatible with 96144Hz, support the major brands of DLP LINK technology 3D projector (regardless of brand). 4LEFT AND RIGHT EYE SWITCHING: DLP 3D glasses support one button left and right eye switching, easy adjustment, high light transmission rate. 5SMALL AND LIGHTWEIGHT: USB 3D glasses are small and light, so they are not too heavy when used and easy to store and carry when not worn.