Hate to answer for him, but it’s the RFIdeas WAVE ID Nano RDR-7511AKU.
He has a whole thread about it (and his experience buying the wrong one) here:
Hate to answer for him, but it’s the RFIdeas WAVE ID Nano RDR-7511AKU.
He has a whole thread about it (and his experience buying the wrong one) here: