Latest Optoma UHD55 user agents:

User Agent	Browser	Platform
Mozilla/5.0 (Linux; arm_64; Android 6.0; Optoma-UHD) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.136 YaBrowser/20.2.6.114.01 Safari/537.36	Yandex Browser 20	Android 6