Esco 941-0114 Basic 20 Wired Speaker Sation Intercom System, Expandable to 32 Speaker Stations
Includes:
- TMK-4000 Destop Controller
- DIB-4008 Digital Interface Box With (8) I/O Card Slots
- (5) Four Speaker/Call Station I/O Cards
- 9 Volt DC 5/5 Amp Power Supply