View 3D content without compromise to picture quality with Sony 3D active glasses and your BRAVIA 3D TV. Designed to deliver an optimal 3D viewing experience, these 3D active glasses have side panels to block out excess light, and feature a super-fast USB rechargeable battery which doesn't need to be replaced. The fast charging time takes only three minutes and provides more than three hours use, and the 30 minutes full charging lasts for approximately 30 hours. Built for comfort, these adjustable glasses are lighter than previous models and are designed to fit over prescription eyewear.