single track credit card reader magnetic head used in mobile telephone 1-,2-, ... head series used in POS (point of sales), magnetic card readers/writers, credit/debit cards 2M-1RLPXX-1 ... 0mm Main parameters include inductance, DC resistance, gap width and more. Adjustable as follows: Inductance from 25 mH to ... 100 ohm to 350 ohmNormal lifetime (500,000 times) and long-lifetime (more than 1,000,000 times) ...