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2) Avoid being placed with signal radiators like reverse
sensor
;
3) The device has GSM antenna and GPS antenna inside. Please
ensure the receiving side of the device is face up and
without metal cover.
Note: The metal cover will lessen the receiving of GPS
signals.
7. Device wiring requirements
7.1 The device power supply is DC 10V-40V. The red line is
positive pole while the black line is negative pole.
7.2 The negative pole of power supply connects with ground or
the metals. Please do not connect with other ground lines.
7.3 When finishing the power supply wire connection, please
make the plug of power supply to the device,
the switch beside
sim card holder.