This is a Tektone intercom model CM491/08, perfect for home security and door entry systems. It is a reliable and efficient device that allows for easy communication between different areas of your home. With its sleek design, this intercom is a great addition to any home security system. It is easy to install and use, making it a great choice for anyone looking for a reliable and user-friendly intercom. Whether you are looking to monitor your home's security or simply communicate with family members, this Tektone intercom is a great choice.