durable. Fine workmanship and perfect style. S4A Model: ACB-001 Description: Control 1 door, get in and out door by swiping card, or get in by swiping card and get out door by button Door Controlled: 1 Door / S4A Model: ACB-002 Description: Control 2 doors, get in and out door by swiping card, or get in by swiping card and get out door by button Door Controlled: 2 Door / S4A Model: ACB-004 Description: Control 4 doors, get in the door by swiping card, and get out door by button Door Controlled: 4 Door Communication: TCP/IP 10M/100M adaptive Power Supply: 12VDC 4-7A Power Consumption of Circuit Board: Less than 100mA Input Format of Reader: Wiegand 26 (All card reader with compatible protocol, such as Motorola, HID, EM, IC one etc) Door opening time extending setting: 1-600 seconds(adjustable) Max q ' ty of controller: No limit Material: plastic colour: As Shown Package Contents: 1 x Entry Attendance Access Panel Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.