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6.18 Charges Inquiry
Send SMS command "balance+password+space+phone
number+space+content" to tracker, it will forward the content to the
specified phone number and return the content from the specified phone
number.
6.19. Alarms
6.19.1 Low battery alarm
When the voltage of the tracker device is near 3.6V, it will send SMS “low
battery+lat./long” information to the authorized number in 3 minutes
interval.
6.19.2 Power off alarm
When the power be cut off or the voltage is 0V, the tracker device will
send SMS “power alarm+lat./long.” to the authorized number in 3 minutes
interval.
6.19.3 SOS
Long Press the SOS button for 3 seconds（For model B, press B button on
remote controller for 3 seconds）, the tracker device will send SMS “help
me!+lat./long.” to all the authorized numbers in 3 minutes interval. It will
stop sending such a SMS when any authorized number reply SMS “help
me!” to the tracker.
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