Fingerprint Readers descriptions We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. R502-a Round Ring Led, Small Thin Uart, Fingerprint Module, Access Control. Features: Integrated Image Collecting and Algorithm Chip Together, ALL-in-One The Flexibility to Adapt to the Conditions Was the Fingers. Whether It is Dry Fingers, Wet Fingers, Light Texture Fingerprints Fingers, and Old Fingers Can Be Embedded into a Variety of End Products, Such As: Access Control, Attendance, Safety Deposit Box Specifications: Model: R502-A Type: Capacitive Fingerprint Module Interface: UART(TTL) Resolution: 508 DPI Voltage: DC 3.3V Fingerprint Capacity: 200 Sensing Array:192*192 Pixel Working Current: 20mA Standby Current: Typical Touch Standby Voltage: 3.3V, Average Current: 2uA Fingerprint Module External Size: Diameter 22 (mm) Fingerprint Module Inner Size:Diameter 19.5 (mm) Fingerprint Module Height: 6 (mm) Effective Collection Area: Diameter 15.5 (mm) Connector: MX1.0-6Pin LED Control: YES LED Color: Purple and Blue and Red Scanning Speed: < 0.2 Second Verification Speed: < 0.3 Second Matching Method: 1:1; 1:N FRR: 1% FAR: 0.001% Work Environment: -20C ---60C Work Humidity: 10-85% Anti-Static Capacity: 15KV Abrasive Resistance Intensity:1 Million Times Communications Baud Rate (UART): (9600 Ãâ€?N) Bps Where N = 1 ~ 12(default N = 6, Ie 57600bps) . Products number : SOMONO81667