SR880C Series module is a contactless smart card reading and writing module developed based on ISO/IEC14443 -1, -2, -3, -4 and ISO15693 international standard protocols. It adopts highly integrated special card reading chip, advanced watchdog and voltage monitoring circuit project design and features a high degree of integration, strong anti-interference ability, small size and more stable performance. Same with the SR630 (125KHz) module size and pin definition; and hardware can be replaced directly.