<http://schema.org/mpn>
"GXV3611IR_HD"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.mironet.cz/grandstream-gxv3611irhd-ip-kamera-1mpix-h264-hd-obj28mm-ir-poe-mikrofrepr-dido-audio-inout+dp299175/>