Card-Tech 10pcs RFID T5577 Re Writable Rewrite 125khz Proximity Access White Thin Cards Operating Frequency: 125khz Read Distance: 2-10cm Size:85mm*54mm*0.8mm Material: PVC Package Content : 10 x T5577 Card+1 Free EM4100 key Compatible with all Door Entry system Typical Applications: Access control, hotel locks, staff attendance and school campus access and payment control, identification and security systems, parking lot entry and payment, social security management, transportation payment, municipal and ancillary service payment