1.8 x 1.8 (45.72 x 45.72 mm) sensing area, which is more than adequate to easily accommodate two fingers Wet or dry fingers do not impact performance, resulting in high quality images in all conditions On-device operation with built-in buttons Easy to mount in desktop as well as kiosk applications Equipped with advanced optical technology to make sure wet fingers do not affect performance FBI IAFIS Appendix F certification: perfect for civil ID and AFIS application, FIPS 201 certication No external moving parts USB 2.0 for high speed data and power