1. tcp/ip fingerprint access & time recorder 2. proximity card support 3. Optical fingerprint sensor Advantages:1. ... houses,office, factory, hotel, school, etc.2. TCP/IP + RS485 Communication + USB Flash Drive Up/Download. 3 ... ModeFingerprint/ID Card/PasswordFingerprint Capacity2,000Log Capacity30,000 eventsCommunicationTCP/IP, RS485U disk up/downloadAvailableLanguageChinese, English, Korean, Spanish, ...