Fingerprint Reader, 508dpi, fits for: Elo Pay M100 non-scanner models Specifications Part Number(s): E121016 Compatibility: Elo Pay M100 non-scanner models Resolution: 508 dpi Dimensions: 2.52" x 1.54" x 0.48" / 64 mm x 39 mm x 12.1 mm Shipping Box Dimensions: 2.80" x 2.40" x 0.87" / 71 mm x 61 mm x 22 mm Weight (Unpackaged): 0.024 lbs / 11 g Weight (Packaged): 0.042 lbs / 19 g Operating Temperature: -20°C to 50°C / -4°F to 122°F Storage Temperature: -20°C to 60°C / -4°F to 140°F Humidity: 5% to 95% non-condensing.