1. With self-learning function. During the fingerprint identification process, the recently extracted fingerprint is successfully registered into the fingerprint database, allowing the user to use it more efficiently when used. 2. Can realize 360-degree automatic correction identification function. Press the module at any angle and the correctly registered finger can pass through comparison. 3. Has a low false acceptance rate of up to 0.001%, making identification safer and more reliable. 4. Supports secondary platform development and supports all Windows series. 5. This USB model is convenient to load and use. 6. Supports up to 1000 fingerprint users, providing great convenience. 7. The fingerprint window uses advanced waterproof technology, so don't worry about wet hands. Specifications: Product Type: Optical Fingerprint Module Condition: Brand New Model: A33 Main Frequency: 120Mhz Flash Memory: 1M bits SRAM: 128KB Fingerprint Collector: Optical Acquisition Fingerprint Size: 640x480 (pixels), 500DPI Fingerprint Registration Capacity: Standard at 1000 pieces False Acceptance Rate (FAR): Less than 0.001% False Rejection Rate (FRR): Less than 0.001% Comparison Method: Comparison 1:N and 1:1 Fingerprint Small Size: 570 bytes Security Level Setting: Level 1 to Level 5 can be set Factory Setting Value: Level 3 Communication Interface: UART, 3.3V-TTL level or USB communication Serial Communication: No parity = NONE, 1 stop bit = 1 Baud Rate: 9600, 19200, 38400, 57600, 115200 Factory Setting: 115200bps Operating Voltage: DC 3.3V +/- 10% A33 Pin Function: : Reset module, active low VIN: Fingerprint Color: Black Material: ABS Package Includes: 1 x Optical Fingerprint Module Only the above package contents, other products are not included. Note: Light photography and different screens may make the color of the object in the picture slightly different from the actual color. The allowed measurement error is +/- 1-3 cm.