Dexcom G5 MOBILE User Manual page 209

Warning
Don't: Never assume the Dexcom G5 Mobile app's Alarm/Alerts vibrations are different
from other vibrating apps.
Do: Look at your smart device and check if vibration is a Dexcom G5 Alarm or Alert.
Why: Medical device apps don't have special priority over your smart device's features.
You can't determine if the vibration is coming from your G5 Mobile app or another app.
Consequences: Missing a severe low or high blood glucose event or making a
treatment decision that results in injury.
Warning
Do: Unplug headphones from your smart device when not in use.
Why: If headphones are plugged in while not being used, you won't hear an Alarm or
Alert.
Consequences: Missing a severe low or high blood glucose event or making a
treatment decision that results in injury.
Precaution
Don't: Never prevent communication between transmitter and display devices.
Do: Keep smart device and receiver within 20 feet of transmitter and away from
obstructions.
Why: If your transmitter and display device(s) are more than 20 feet apart or are
separated by an obstruction, they might not communicate.
Types of obstruction differ, and not all types have been tested. Obstructions can
include water, walls, metal, etc.
Water (for example, while swimming, surfing, bathing, etc.) can severely limit
communication range.
Consequences: Missing a severe low or high blood glucose event or making a
treatment decision that results in injury.
Dexcom G5 Mobile System User Guide
Sensor Glucose Alarm and Alerts
207