Product Review

NOTE: Please use arduino IDE 1.6.6
Features:
Make adding fingerprint detection and verification super simple.
Typically used in safes颅-there's a high powered DSP chip that does the image rendering, calculation, feature-finding and searching.
Connect to any microcontroller or system with TTL serial, and send packets of data to take photos, detect prints, hash and search.
You can also enroll new fingers directly - up to 162 finger prints can be stored in the onboard FLASH memory.
There's a red LED in the lens that lights up during a photo so you know it is working.
Specifications:
Supply voltage: DC 3.8-7.0V
Operating Current: <65mA
Peak current: <95mA
Fingerprint image time: <1.0 seconds
Window area: 14.5*19.4 mm
Signature File: 256 bytes
Template files: 512 bytes
Storage capacity: 1000
Note:
There are basically two requirements for using the optical fingerprint sensor. First is you'll need to enroll fingerprints - that means assigning ID #'s to each print so you can query them later. Once you've enrolled all your prints, you can easily 'search' the sensor, asking it to identify which ID (if any) is currently being photographed.
You can enroll by using the windows software (easiest and neat because it shows you the photograph of the print) or with the Arduino sketch (good for when you don't have a windows machine handy or for on-the-road enrolling)
Connection
pin #2 is IN from sensor (GREEN wire)
pin #3 is OUT from arduino (WHITE wire)
5V connect sensor (Red wire)
GND connect sensor (Black wire)
Document link:
Package includes:
1 x Fingerprint Recognition Module