Features: This fingerprint module can be used for fingerprint collection, fingerprint registration, fingerprint comparison and fingerprint search, it's easy to use. When the fingerprint for image is read, it has sensitive response and judgment to the wet and dry fingers, and obtains the best for image quality, which is suitable for a wide range of people. The self-learning adaptation function can also be customized, and the parameters are automatically adjusted according to changes in the user's habits, climate, etc., to achieve a better match. Strong anti-static ability, especially suitable for areas where the environment is dry and prone to static electricity. Can be used for door locks, safes, guns, financial and other security areas; access control systems, industrial computers, POS machines,etc. Specifications: Material:Plastic Color:Black Size:Approx.5.6x2cm/2.2x0.79in voltage: for DC 3.6 ~ 6.0V / 3.3V Supplying Current: