Fingerprint Capacity 500 ID Card Capacity 1,000 User 1,000 Record Capacity 50,000 Display 2.8-inch TFT Screen Communication TCP/IP, USB-Host, Wi-Fi(Optional) Standard Functions Automatic Status Switch, Photo ID T9 Input, Camera, 9 digit user ID, Built-in Battery, Multiple Verify Mode, External Bell Optional Functions ZigBee,SSR,Soap Power Supply DC 12V 1.5A Operating Temp 0 °C - 45 °C Operating Humidity 20%-80% //www.zkteco.com.bd/product_detail/MB20.html