Latest Bravis NP747 SD user agents:

User Agent	Browser	Platform
Mozilla/5.0 (Linux; Android 4.4.2; BRAVIS NP 747 SD) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36	Chrome 81	Android 4
Mozilla/5.0 (Linux; Android 4.4.2; BRAVIS NP 747 SD Build/KVT49L) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/30.0.0.0 Safari/537.36	Chrome Webview 30	Android 4