There are actually like 10 exact same glasses from different manufacturers/brands, from 250-ish moneys upwards (you might need various addition interfaces for your devices, like PC, HDMI, etc - sold separately and unreasonably expensive for what they are).
They all use the same design, Sony OLEDs, speakers, batteries, accessories, etc, they only differ in front design.
There are actually like 10 exact same glasses from different manufacturers/brands, from 250-ish moneys upwards (you might need various addition interfaces for your devices, like PC, HDMI, etc - sold separately and unreasonably expensive for what they are).
They all use the same design, Sony OLEDs, speakers, batteries, accessories, etc, they only differ in front design.