Awind WP-820 User's Manual - Manual (Page 30)

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6. Restart wePresent box to take effect.
Warning: Don’t power off wePresent while firmware upgrade in
progress, otherwise will cause your Box doesn’t work and have to return device
to your vendor for fixing.
Reboot System
Click [Reboot System] button, to restart system
♦ <Reboot>: reboot system automatically.