Which one do I need choose?
I have cards that can be read by RFID reader 13,56MHz, but I do not know if I make system with 125KHz then this cards can be read by this RFID?
I know that this card can be read by 13,56 MHz RFID reader!!!
May be 125 MHz RFID reader can do it too? I want this frequency because I see many readers with this frequency... and price of them it lower.