Dexcom G5 User Manual page 203

WARNING
Do: Disconnect headphones from your smart device when not in use.
Why: If headphones are connected 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, when 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.
PRECAUTION
Do: Set smart device and receiver settings separately.
Why: Settings are specific to each display device and don't carry over to other devices. If
you set up one device and then use another, you won't get an Alarm or Alert.
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 201