Dexcom G5 User Manual page 33

more than 20 feet from each other or are separated by an obstruction, they
might not communicate, resulting in you missing a severe low or high glucose
event.
As with any wireless device, water is often the biggest culprit in reducing
communication distance. This applies to the transmitter and display devices.
Take special care when swimming, getting into a pool, bathtub, shower, etc.
Setting Alarm/Alert Notifications
When using both a receiver and a smart device, you must set your settings
separately in each. If you set up one device and then use another, you might
not get an Alarm or Alerts, causing you to miss a severe low or high glucose
event.
Using an accessory device (like a smart watch) might override your smart
device sounds. Alarm or Alerts might vibrate or be heard on the accessory
instead of your smart device. After connecting any accessories, make sure
that the smart device settings allow you to continue receiving Alarm or Alerts
on the smart device.
Is It On?
If the receiver or smart device is turned off (Shut Down), it will not display
sensor data, information, Alarm or Alerts. Make sure they are turned on;
otherwise you won't get sensor glucose readings or Alarm or Alerts, causing
you to miss a severe low or high glucose event.
Smart Device Warnings
Next are warnings for just your smart device.
Warnings
Smart Device Settings
The app can't override your smart device's internal settings. Also, accessory
devices (like a smart watch or other wearable smart devices) might override
your smart device's Alerts and Alarm.
To receive Alarm or Alerts you must:
Settings
1. Make sure app Notifications are turned on in the menu.
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Dexcom G5 Mobile System User Guide
Risks and Benefits