Connected doorbell and video door phone -door access control system Highlights generic brand door access control system Description: Full set of access control kits, including access control panel, 2 coin card readers and 20 coin key fobs. Network communication via TCP/IP Support offline operation and real-time monitoring, mass storage, convenient for use. Memory control up to 20,000 users / Up to 100,000 event buffers The access control system will automatically alarm for illegal entry or long door closing. The advanced access control system can improve your home and office security. It is perfect for businesses, offices, factories and communities. Also, can be used for professional users such as bank, cash desk, telecommunication station, power station, prison and police station, etc. Specification: Material: Plastic Size (LxWxH): approx. 180x117x30mm / 7.09x4.61x1.18 inch Voltage: DC12V, 4-7A Reader input format: Wiegand 26/34 bit (card reader with compatible) Door open time: 1-600 seconds (adjustable) Maximum controller quantity: Unlimited Operating temperature: -40~70 Operating humidity: 10-90% RH, no condensation User quantity: 20,000 users Maximum distance from reader to controller: 100M (suggested distance 80m) The package include: 1 Piece Access Control Panel 2 Pieces Card Readers 20 Pieces Key Fobs