Control Freq 3G GSM intercoms and door entry systems are next level!What comes with an entry system is not meets the eye. This is what a user sees. The real magic is in the ability to remotely manage who gets access, when and how, online! If you're looking for an intercom door entry system that gives you remote management of user access, you're in the right place! Contact us to discuss your application on +44(0)1273 257060.