Grandstream GS-GXP2200EXT Expansion Module For VoIP Phone | GRANDSTREAM GS-GXP2200EXT

Description Large 128×384 graphic LCD providing feature-rich graphics Daisy-chain 4 modules for up to 160 programmable buttons 2 page switch keys which allows up to 40 extensions per extension module 20 programmable buttons per module Busy Lamp Field (BLF)