Esco 941-0111 Basic 8 Wired Speaker Station Intercom System, Expandable to 16 Speaker Stations
Includes:
- TMK-4000 Desktop Controller
- DIB-4004 Digital Interface Box with (4) I/O Card Slots
- (2) Four Speaker/Call Station I/O Cards
- 9 Volt DC 5/5 Amp Power Supply