MIFARE 1 S50 comprises a range of contactless smart cards designed in accordance with the ISO/IEC 14443A standard. Its communication layer, or MIFARE RF interface, adheres to parts 2 and 3 of the ISO/IEC 14443A standard. Additionally, the security layer includes features for encrypting the domain authentication CRYPTO1 data stream.
Specifications:

1. Product basic info
   1. Primary colours: White
   2. Depth unit: 0.8 mm
   3. Height unit: 54 mm
   4. Width unit: 85.5 mm
   5. Weight unit: < 5.6 g
   6. Material: PVC (polyvinyl chloride)
2. Technical data
   1. Card reading frequency rating: 13.56 MHz
   2. Card function: Read, Write
3. Operational properties
   1. Working temperature range: -20-75 °C
   2. Card reading distance: <= 10 cm