Door access controller.Spectra’s QuadXs 2C is engineered for optimum performance. It provides real-time monitoring of 4-doors access in all respects. It supports door-wise anti-pass backs. A prominent solution built for security; its controller and power supply units are protected with suitable housing to avoid any accidental damages. It allows quick data transfers to a centralised server, making it extremely versatile and agile system to work with.