Expansion Module for GXP2140, GXP2170 and GXV3240, 20 programmable buttons (2 pages on smart screen, total 40 contacts)

-20 lines per page (each module contains 2 pages, up to 40 lines per module). -Up to 160 with 4 series connected modules Compatible Grandstream IP phones GXP2140, GXP2170 and GXV3240 Support for functions Local graphical interface with animation controlled from the GXP2140 or GXP3240 main phone; Multiple lines/calls Power Powered by the main phone Firmware Updates delivered from the main phone Dimensions (L x W x H) 206 mm x 117 mm x 32 mm Weight 0.38 kg Temperature 0 ~ 40°C (32 ~ 104°F) Humidity 10-90 % non-condensing Approval FCC/CE/C-Tick