Hello everyone Rechargeable Sony Active 3D Glasses Using Sony's specialized Active Shutter technology, these 3D glasses work with BRAVIA 3D TVs to deliver a highly realistic 3D effect. They operate at high precision for smooth 3D viewing from anywhere in the room and with less flicker from ambient room light. Fast and easy to recharge, they offer long viewing times. Lightweight so you can watch 3D video for hours, durable so you can keep using them again and again. These stylish, wraparound 3D glasses are designed to block out external room light and reflections for a brighter, better quality 3D image.