Store 1000 fingerprints,Quick identification and comparison.High precision sensor,Pixels 208x288 pixels.Dual communication interface,More convenient to apply.Please note that this type of product is not for ordinary users. It must have a single-chip microcomputer. Otherwise, it cannot be used and may burn out the product. Hign-concerned Chemical:NoneModel Number:R304AInterface:USB and UARTFingerprint module size:20.4x33.4 (mm)Effective collection area:12x17.5 (mm)Fingerprint capacity:1000Voltage:DC 4.2-6.0VSensing array:208x288 pixelColour:As ShownMaterial:PCB Package Contents:1set * Module Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.