Milestone ESSL Identix K21 PRO Biometric Fingerprint Scanner (Black) Storage CapacityFingerprint Templates 1000 Transaction Storage1,00,000 Card CapacityNA Card ReaderNO BiometricFingerprint Sensor 500 DPI Optical Sensor Audio/VisualDisplay2.8” Color TFT Keypad4 x 4 Keypad LED IndicatorGreen/Red Schedule Bell/SpeakerMini Speaker CommunicationCommunicationRS232, RS485, TCP/IP, USB Push dataYes Standard featuresSchedule Bell,Self Service Query,SSR Recorder, Automatic Switch,DST, T9 Input Power & EnvironmentPower Supply5V DC, 0.8AMPs Operating Temperature0oC to 45oC Operating Humidity20% -80% Dimension183 x 138 x 45 Access ControlWiegandNO RelayNO Support Fire AlarmNO Door SensorNO Anti PassbackNO Door BellNO Exit ReadersSupport exit readersNO OptionalBatteryNO Card readersNO CommunicationNA Dual ModeEither SSR Mode or Software Mode Compatibility Compatible Software & SDK Etime track lite desktop & Web, Epush Server Major Applications Time & Attendance , Canteen management, School attendance, Production Management, Gym & clubs