Grandstream GBX20 Expansion Module VoIP Adapters Its excellent audio performance and

Its excellent audio performance and flexible connectivity via USB or a 3

all without compromising mobility

3" color display

perfect for connecting with clients and colleagues

Grandstream GBX20 Expansion Module VoIP Adapters Its excellent audio performance andThe Grandstream GBX20 is a programmable key expansion module built for receptionists and high call volume users who need to manage more lines than a standard phone display allows. It attaches directly to compatible Grandstream desk phones. Features include: 4. 3" color LCD with 20 keys per page Up to 40 contacts per module, 160 with 4 daisy chained modules BLF, call park pickup, and speed dial support Powered through the host phone Automatic firmware