The CPR CallBlocker V108 is an all-in-one call blocker designed to easily filter out unwanted and prank calls. With its sleek grey design and convenient block now button, users can quickly cut off annoying calls with a single press. The device is specifically designed for use with DSL (RJ-11) connectors, making it compatible with a wide range of home phones and communication systems. The CPR CallBlocker V108 offers a simple and effective solution for those looking to protect their peace and quiet from unwanted phone calls. full v108 user/installation guide supplied.