With internal EM reader Frequency: 125KHz Effective distance: 10cm Zone one: Up to 1000 passwords & card holders. Zone two: Up to 10 passwords. Card access, code access and combined access. Digital keypad operation. Built-in pickproof function. Watchdog timer, powerful reboot and self-recovery watchdog can connect with the external unlock button. Dual relay outputs. Unlock output delay time: 0-99s IP rating: 65 Dimension: 105x150x38(mm) Dual relay outputs for door opening, door status detecting, open door bu button.