Dark background infrared optical fingerprint module based on independent IDworld QS808 fingerprint chip research and development, high performance, low power consumption (< 20 ua). Carrying acclaimed Korean fingerprint algorithm, fast and exact recognition speed, support intelligent self learning: can automatically to adapt to changes in the fingers. The dark background infrared optical imaging technology, dry, wet fingers strong adaptability. A standard UART interface, easy to develop. Widely applied to door locks, safe... And other industries.