Features of access board: Communication: TCP/IPSoftware Supportable • Database: Access SQL • Power Supply Input: DC 12V, 47A Input Format of Reader: • Wiegand 26 bit (All card reader with compatible protocol, such as Motorola, HID, EM, M1, etc) • Quantity of Readers: 4 units Door Controlled: 4 door (Get in the door by swiping card, and get out door by button) • Quantity of Users: 20,000 users Quantity of Event Buffers (offline): 100,000 event buffers Max Distance from Reader to Controller: 100m / 328ft (suggestion distance 80m) • Features of power box: • Built-in reverse surge protection and Short-circuit protection function With charge and discharge function,can add a 7AH 12V DC battery,can meet the needs of an electric mortise lock,a card reader and a controller to work 35 hours after power failure (External battery not included) Support max 2-4 Card Reader and 1 access control board Support max 3pcs electric bolt lock or 3pcs 280KG magnetic lock Specifications of power box: • AC Input: AC110V/60Hz DC Output: DC12V/5A • Power: 50W 12V/24V Adjustable • Output: No Size: 11x9.2x2.6in / 280x234x66mm • Weight: 2.5Kg / 5.5lb • Package: 1 x Access Control Board 1 x Metal Power Box 1 x CD