Applied model

1. Americas: IFP**50 - Gen 1, IFP**50 - Gen 2, IFP 9850-3

2. Asia Pacific & Africa: IFP**50, IFP**50-2, IFP 9850-3

3. Europe: IFP**50, IFP**50-2EP,. IFP 9850-3 EP

Please update IFP to the latest FW version via OTA or by USB file from ViewSonic website. Then you can select sleep without key file.