• Supply voltage: 3.6 - 6.0VDC
• Operating current: 120mA max
• Peak current: 150mA max
• Fingerprint imaging time: 
• Window area: 14mm x 18mm
• Signature file: 256 bytes
• Template file: 512 bytes
• Storage capacity: 162 templates
• Safety ratings (1-5 low to high safety)
• False Acceptance Rate: <0.001% (Security level 3)
• False Reject Rate: <1.0% (Security level 3)
• Interface: TTL Serial
• Baud rate: 9600, 19200, 28800, 38400, 57600 (default is 57600)
• Working temperature rating: -20C to +50C
• Working humidity: 40%-85% RH
• Full Dimensions: 56 x 20 x 21.5mm
• Exposed Dimensions (when placed in box): 21mm x 21mm x 21mm triangular
• Weight: 20 grams

Downloads:

• Arduino interface library on github
• Datasheet (its not really a great datasheet and its Chinese but its better than nothing)
• Windows-only test software