"The VTech CM18445 - Main Console DECT 6.0 4-Line Expandable Small Business Phone with Answering System is a new small business system that makes it easier than ever to connect your office. Installation is simple. Only the main console needs to be connected to analog phone lines. The handsets and desksets wirelessly connect to the system with one touch using DECT 6.0 technology, so you can install an entire office system in minutes. No professional assistance required. Plus, the VTech CM18445 - Main Console DECT 6.0 4-Line Expandable Small Business Phone with Answering System allows you to grow into a fully featured telephone system with up to 10 stations. The main console digitally records up to 180 shared minutes of incoming messages, outgoing announcements and memos. The auto attendant for each line can answer outside calls, provide callers with a company directory and route calls to the appropriate extension. Customizable music on hold includes a 2.5mm jack for connecting music devices like MP3 players, boom boxes, tablets or smart phones