Introducing the PRO Call Blocker CT-CID803 PLUS, a powerful device that allows you to take control of your landline fixed phone. With a number of advanced features such as call blocking and caller ID, this device is ideal for those looking to manage incoming calls efficiently. The device comes in a sleek black color and is designed to be easy to use, with connectors that fit a 3.5 mm jack and an interface that is compatible with DSL (RJ-11). This model is perfect for those who value quality, as it is ROHS compliant. It is a single-line phone system that can block unwanted calls and is ideal for home telephones and electronics. With the PRO Call Blocker CT-CID803 PLUS, you can ensure that you receive only the calls you want, making it an essential tool for anyone who is serious about managing their communication.