Features: -User Codes – Up to 16 customizable user codes and master code option for increased security. -SecureScreen – Patented technology to help prevent code detection from fingerprints on the touchscreen. -9V Backup Power – Use a 9V battery as backup power in case the batteries run out (batteries not included). Door Type: -Exterior. Dimensions: Overall Height – Top to Bottom: -9.8″. Overall Width – Side to Side: -5.5″. Overall Depth – Front to Back: -3.7″. Overall Product Weight: -3.2 lbs.