The VTech AM18447+ (4) AM18407 Cordless Handests - main console works with the Am18247 extension Deskset and Am18047 accessory handset to create a new small business office phone 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 AM18447 - main console allows you to grow into a custom built 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.