The First Alert DC8405-420 Security Kit provides you with four cameras to give you wide security coverage over your home or business. These cameras allow you to effectively monitor your property regardless of lighting conditions because of its 50-foot IR range for excellent night-vision video. You may view your security videos on up to 8 different channels for maximum protection. The cameras record video on 420TVL resolution to provide you with a clear view of your surroundings. This kit also includes an integrated 500GB hard drive so you can store hours of recorded video for future reference.