The Sharp AN3DG20B rechargeable Liquid Crystal 3D glasses will bring your LE831 series TVs to life. It features a cloth bag to keep them safe and clean when not in use and a glasses cleaning kit. Key benefits: Rechargeable via TV's USB terminal Battery life: 30 hours continuous use Charging time: 90 minutes 3D to 2D conversion button Stylish black frames Suitable for: LC-40LE831E, LC-46LE831E, LC-52LE831E and LC-60LE831E models.