This looks like it is a Wiitek SFP-10G-T that is designed to be compatible with the Zyxel switches (just rebranded and given the proper encoding for compatibility):
Good quality ZYX Compatible 10GBASE-T Copper SFP+ Transceiver from Manufacturer at Affordable Factory Price, 3 Year Warranty&Money-back Guarantee.
www.optcore.net
The Wiitek is pretty much still the best performing transceiver:
Our buyer's guide for SFP+ to 10Gbase-T adapters. We purchased nine popular models and tested their performance, power consumption, and Nbase-T support
www.servethehome.com
I can't be 100% positive that it is a rebranded Wiitek, but given OEM part numbers, specs, and price, it certainly looks like it.