This Q-See QT504 4 channel DVR surveillance system is the perfect solution for keeping your property secure. With its 500GB hard drive, you'll have plenty of space to store your footage. The system is black in color and has a wall plug-in power source for easy installation. The DVR supports BNC connectivity and comes with digital features for a seamless surveillance experience. This product is ideal for use in home surveillance and is part of the surveillance and smart home electronics category.