1. Code: Open&Close with 3-8 digit code. 2. Bolt: One-way locking bolts. 3. Interior: Include the protective floor carpet. 4. Indicator: 3 indicator lights (green, red and yellow), indicate open, low battery and warning. 5. Reset button: Change the code easily with reset button. 6. Battery: Run on 4x1.5V AA batteries. 7. Working system: Use the Knob to open and close with a soleniod system. 8. Override key: Supply the override key for emergency use. 9. Fixing: Pre-drilled holes at the buttom and back(fixings included).