... , USB, WIFI, DHCP, Web Server. 3. 3.5 inches TFT touch screen, you can add staff name, shift and photo on machine ... directly through this touch screen. 4. Build in backup battery can support 3 hours when ... 3 years when no current 7. LCD: 3.5-inch TFT Color LCD, 320*240 Pixels 8. Verification mode: 1: N, 1:1 ...