Does your old read also read the blue key chain tags that came with the new ones? If not, the new readers might not be compatible with the MIFARE standard...
That risk is always there if you buy cheap stuff on ebay without any documentation.
Does your old read also read the blue key chain tags that came with the new ones? If not, the new readers might not be compatible with the MIFARE standard...
That risk is always there if you buy cheap stuff on ebay without any documentation.