The glasses are design for home entertainment, classroom and museums and other professional field, they have good performance in transmittance, contrast ratio and color accuracy, delivering a bright and vivid 3D scene. The 3D glasses can be use combine with Projector Emitter (model: HEP) in 3D gaming or movie watching; or use combine with Long Range IR Emitter (model: HEB) to build a luxury 3D Home theatre or present a 3D show for students. No matter in which application, the glasses will help you give your viewer with a brilliant 3D experience. Specification Weight (contain battery): 35g Shutters: Light-speed LCD shutter Power management: Power button and Auto OFF Field rate: 120-480HZ Contrast ratio: 1000:1 Transmittance: 38+/-2% Sync operation: IR Operation temperature: 0°C-40°C Storage temperature: -10°C-75°C Power supply: rechargeable battery Battery life: 100hours continuously working Comfort: flexible earpieces, Rubber nosepiece Product Feature: 1) Excellent color accuracy& high contrast bring you optimal 3D viewing experience 2) High-tech light-speed LCD shutter technology 3) Stylish appearance 4) Intelligent synchronization 5) Anti-interference IR Communication 6) Lightweight & comfortable 7) Energy efficient 8) Auto OFF 9) Auto low power detection 10) Powered by rechargeable battery 11) Wide viewing angle 12)Size for kids only