User Manual

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15.21 “Changes or modifications are not expressly approved by the manufacturer could
void the user's authority to operate the equipment. Changes or modifications to the
device may void FCC and CE compliance. In frequently used radio links should be tested
regularly to protect against undetected interference or fault.”
"Operation is subject to the following two conditions: (1) this device may not cause
interference, and (2) this device must accept any interference, including interference that
may cause undesired operation of the device."