Built-in 7600 mAh backup battery extends extra operation time IP65 rated waterproof and dustproof protection grade Shock proof (0.5m above the ground) with unique rubber coating Communication: TCP/IP, USB-host, Optional: Wi-Fi, GPRS and 3G (WCDMA) Multiple authentications: support fingerprint, ID card or Mifare card Fingerprint Capacity: 5, 000 (Standard)/10,000 (Optional) Card Capacity: 30,000 Display 3.5-inch TFT Screen,Fingerprint Capacity,5, 000 (Standard)/10,000 (Optional). Card Capacity,30,000 (ID Card),Transaction Capacity 200,000 Algorithm Version,ZKFinger VX10.0 Communication TCP/IP, USB-host ; Optional with Wi-Fi, GPRS,3G (WCDMA) Standard Functions ADMS, Work-code, DST, Self-Service Query, Automatic Status Switch, T9 Input, Photo-ID, 9 Digit User ID, SMS, ID Card Optional Functions,HID /Mifare Card,Protection Grade IP65,Power Supply 12V 3A DC; Built-in Backup 7600 mAh Battery Operating Temperature 0 oC- 45 oC,Operating Humidity 20%-80% Dimension225 x235x125(mm) HxWxD