– D7 Expansion Module in Black
– Supports all 700 series telephones with USB ports
– High-resolution graphical display with backlight
– 18 freely programmable multicolor LED function keys
– Dual-angle foot stand: 46° and 28°
– Fully configurable via host phone
– 18 highly configurable self-labelling LED keys
– High-resolution black & white display with backlight
– Daisy chain up to 3 modules
– Plug and play
– Power supplied by phone via USB port for first D7 module