the 3dtv glasses four - compatible with nvidia philips hp envy laptops .
includes charging adapter and 3 nosepieces . bottom of left temple showing usb port with cover removed blue led charging light and polarity switch . glasses are compatible with vizio samsung mitsubishi panasonic sony crystaleyes nvidia xpand i o elsa x3d 3dtv corp glasses and emitters and others . sony 2010 model 3d lcd tv s and 3dtv corp midrange and cinema emitters . superior image - no ghosting no tinting-lightweight comfortable usb recharger and 3 nosepieces included - unique polarity reversal switch-essential for many uses . compatible with the wireless glasses and gaming dongle interface sold by x3d . i 0 razor etc.