M3900 Display-Based Expansion Module (NTMN67AA70)
The M3900 Display-Based Expansion Module is designed exclusively for the M3904 and M3905 Telephone sets. This module attaches to the phone and provides 24 additional programmable feature keys.
- Optional add-on to the M3904 and M3905
- Additional programmable feature keys: 24
- Three layers of eight programmable feature keys
- Visual indicator for page
- Cannot be used with KBA
- One Year Warranty Included with Extended Warranty Options at Low Prices!