ZKTeco ZK9500 is a desktop USB fingerprint reader used for enrollment and verification (it is a scanner, not a standalone door access controller), Sensor Type: Optical (2-megapixel CMOS sensor) Resolution: 500 DPI (300 × 400 pixels) Effective Collection Area: FAP20 (15.24 × 20.32 mm) Processor & Memory: 280 MHz DSP, 32 MB Flash Template Algorithm: ZKFinger V10.0 Communication Interface: USB 2.0 / USB 1.1 (USB Type-A)