Steelcoat for durability (> 4 million touches) Small form factor. Reader Size (mm): 84 x 33.8 x 14.3 Works well with dry, moist or rough fingerprints High-quality fingerprint image. Image Resolution: 508 ppi Multiple cable lengths and connectors Scanned Finger Area (mm): 12.8 x 18 8-bit grayscale (256 levels of gray) USB 2.0 full speed (Type A) or Micro USB (Type B) USB Data Encryption: AES-56 (no export restriction), AES-128 (export restrictions) Ingress Protection: IP 63 for moisture and dust protection