... card, co-operating with users’ computer. 4 cameras can be installed both indoor and outdoors, ... 4 cameras with different frequency around 2.4GHz4Chs DVR Card (model number: KDM-404B)1) 4Chs video ... ccd camera, cctv system, security system, surveillance equipment, surveillance system, color cctv camera, color ccd camera, cctv products, Surveillance products, security system products, shenzhen camera, ...