M1 Non-Contacting IC Card Hikvision, DS-K7M102-M Sensing Frequency: 13.56MHz Memory Capacity: 1024 bit Function: Read and Write Sensing Distance: 0cm to 4cm Working Temperature: -10oC to +50oC (14oF to +122o F) Dimensions (LxWxH): 26mm x 50mm x 4mm (1.02 x 1.97 x 0.16) Material: PVC pachet