SainSonic Zodiac B921 Series Universal Button Battery Powered 3D Active Shutter Glasses for Sony, Panasonic, Toshiba, Sharp, Samsung 3D HDTVs **Black** Optimize 3D experience for gaming, movies and other visual content. Powered by button batteries, which is much lighter in weight and could work for approximately 100 hours. Battery life check function is designed especially to remind the viewer when to replace the battery. Compatible with most major brand 3D HDTVs, such as Sony, Toshiba, VIZIO, Panasonic, LG, Sharp, Samsung, etc.. N/A