Xiamen Smarttek Co. Ltd. WSP404 Manuel D’Utilisation

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Changes or modifications not expressly approved by the party responsible 
for compliance could void the user's authority to operate the equipment. 
This device complies with Part 15 of the FCC Rules. Operation is subject to 
the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference 
that may cause undesired operation.