KOOKYE Optical Fingerprint Reader Sensor Module Locks All-in-one For Arduino UNO R3 Typically used in safes-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. Application: Fingerprint door locks, safes, IPC, POS, driver training, attendance, Private clubs, management software, license, fingerprint payments etc For user manual and detailed totutorial, please kindly visit our tech support website: http://kookye.com/?p=1544 or downloard link:User Manual: http://www.kookye.com/driver/KOOKYE-Fingerprint%20user%20manual.pdf