Access control system:Model Number: SY5100 Name of the: MOUNTAINONE 1. classic look with useful function 2. high quality and high safety 3. Designed for home and office 4. Complete programming from the keyboard 5. easy to install and program 6. Support 2000 standard users 7. Backlight key 8. Supports card, pin, card + pin 9. Built-in bell button can connect an external bell 10. User capacity: 2000 11. Card reading distance: 3 ~ 6 cm