The Grandstream GXP2140 Telephone 2200 EXT Expansion Module is a corded telephone with 4 phone lines, designed for business use. It features a speakerphone capability for hands-free communication and is black in color. This unit, made by Grandstream, has an interface compatible with DSL/Phone (RJ-11) systems. The expansion module is a single unit and is manufactured in China. It is a reliable and efficient option for expanding the capabilities of a VoIP business phone system.