Control of memory up to 20,000 user / Up to 100,000 event buffers Access control system will alarm automatically for illegal break in or long time unclosing the door. The advanced access control system can improve the safety of your home and office. It is perfect for businesses, offices, factories, and communities.Also, can be used for professional users such as bank, cash house, telecom station, power supply station, prison and plice station, etc. Material: Plastic Size (LxWxH): approx. 180x117x30mm/7.09x4.61x1.18 inches Voltage: DC12V, 4-7A Input Format of Reader: 26/34 bit (All card reader with compatible protocol) Door Opening Time: 1-600 Seconds(adjustable) Max quantity of controller: Unlimited Operation Temperature: -4070 Operation Humidity: 10-90 % RH , No Condensation Quantity of Users: 20,000 Users Max Distance from Reader to Controller: 100M (suggestion distance 80m). 1 Piece Access Control Panel 4 Pieces Card Readers 40 Pieces Keyfobs. People always bought together with. The item "Smart Door Entry Control Panel with 4 Card Readers & 40 Keyfobs-White" is in sale since Friday, February 5, 2021. This item is in the category "Home, Furniture & DIY\Home Security\Other Home Security". The seller is "fellaptop" and is located in Shenzhen. This item can be shipped worldwide.