The Grandstream GXP2200EXT is a dedicated expansion module designed to increase the productivity of users who handle a high volume of calls. By connecting this black module to a compatible GXP2140, GXP2170, or GXV3240 phone, you gain access to 20 dual-color LED programmable buttons. These keys are organized across two pages, allowing you to manage up to 40 contacts per module. For those managing very large teams, up to four modules can be daisy-chained together to provide a total of 160 programmable contacts. Navigation is handled via two arrow keys that let you switch between pages quickly, while a 128x384 backlit graphic LCD provides clear visibility of your assigned lines. The device supports a wide range of professional telephony functions, including Busy Lamp Field (BLF), speed dial, and bridged line appearance, as well as call parking, presence, and intercom features. Measuring 206 x 117 x 32 mm and weighing 380 g, the unit comes with a support stand, connection plate, cable, and screws for a secure setup on your desk.