The GXP2140 is a Linux-based device with 4 lines, Gigabit ports to ensure the fastest possible connection speeds, 5 XML softkeys for personalization, and 5-way voice conferencing to keep business users in touch. By being compatible with Grandstream’s GXP2200EXT extension module, the GXP2140 can offer users up to 160-speed dial / BLF keys combining up to 4 GXP2200EXTs to easily control the presence and status of other extensions and transfer calls. High-definition audio and a 4.3 “color LCD screen create high-quality calls, and built-in Bluetooth support enables the use of Bluetooth headsets and phonebooks and call transfer from paired mobile devices. This business IP phone also features an electronic hook switch support for Plantronics headsets and a built-in USB port. The GXP2140 is perfect for business and SMB customers with a need for quality and versatility in their desktop communications. (Power supply not included).