The GS-911wifi has a configurable sleep / low power mode which can be configured under the Setup->Options menu. It will only draw about 5 mA when sleep mode is activated and thus preserve your bike battery.
It can monitor if the bike battery voltage is below a specified threshold (with 0.2 V hysteresis), the ignition pin (if fitted) is no longer activated, that CAN Bus Diagnostic activity has stopped and that a browsing device is no longer connected to the GS911 and then switch to sleep mode after a specified time interval. During sleep / low power mode the LED will flash at 2 second intervals as described here.
The device will wake up if the voltage threshold is exceeded, or the ignition pin is pulled high or CAN bus activity is detected. The device can also be forced to wake up by pressing the WiFi toggle button or connecting with a USB cable to a computer.
If the bike's diagnostic connector is not located under the seat you can use an extension cable to route the device to the connector while leaving it under the seat.