Huawei E5573Cs-322 - Power Button Operation; Micro USB Port; Signal Strength Indicator; Reset Button Function

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 Red: Low battery.
 Power button
Press and hold to turn your Mobile WiFi on or off.
 Micro USB port
 Signal indicator
 Green: Strong signal.
 Yellow: Weak signal.
 Red: No signal.
 RESET button
Press and hold to restart your Mobile WiFi and restore it to its factory
settings.
If you forget the username, password or SSID for your Mobile WiFi, try
restoring the device to its factory settings.