ZK4500 Fingerprint Reader is a USB fingerprint sensor designed for use with Digital Personas U.are.U. applications and developer tools. The user simply places his/her finger on the glowing sensor window, and the device quickly and automatically captures the fingerprint image. Onboard electronics calibrate the device and encrypt the image data before sending it over the USB interface. Digital Persona. products utilize optical fingerprint scanning technology for superior image quality and product reliability. Features: High-performance, maintenance-free optical fingerprint sensor. Readily accessible for any finger. High quality industrial-class ABS plastic material with scratch-proof texture surface. Removable weighted stand. High speed USB interface, LED indicates the status of the device. available SDK for secondary development. This USB fingerprint sensor designed for use with Digital Personas U.are.U. applications and developer tools. The user simply places his/her finger on the glowing sensor window, and the device quickly and automatically captures the fingerprint image. Onboard electronics calibrate the device and encrypt the image data before sending it over the USB interface. Specification:Model: ZK4500Material: ABS PlasticPixel Resolution: 500 dpiFingerprint Sensor: OpticalImage Size: 280*360 pixelSensing Area: 15mm*18mmSupply Voltage: 5.0V +/- 0.25V supplied by USBSupply Current Scanning: 170mA (type)Supply Current Idle Mode: 120mA (type)Supply Current Suspend Mode: 2mA (.)ESD Susceptibility: >15 KVImage Data: 8-bit grayscaleOperating Temperature: 5~35Operating Humidity: 20%-80% (non-condensing)Storage Temperature: -10~60Storage Humidity: 20%-90%(non-condensing)Standards Compliance: FCC Class B, CE, VCCIApplications: for desktop PC security, mobile PCs, custom applications, home and Office Use. Package list:1 * USB Fingerprint Reader1 * CD Driver