Purchased four pairs for use with my Panasonic VIERA TC-P60ST50 60" plasma. The glasses work as they should, no fancy bells or whistles. Get close to your TV, press the button to pair them with the TV and you are ready for 3D. Pick up some extra batteries for less than $2 for 5 of them. The batteries should last up to 70 hours, but that probably depends on the quality of the battery. Great if you have kids and don't want to spend $200 outfitting the family with the fancy Panasonic glasses. Might purchase a few more for when friends come over!