6V DC external adapter, 6 "D" cell batteries (for main operation), and 2 "AA" batteries (for back-up clock and memory retention). 2. Setting Up Your DX-390
The DX-390 holds 100 stations broken into four banks of 25. radio shack dx-390 owners manual
Offers a straightforward view of the owners manual, including key features and operating instructions. 6V DC external adapter, 6 "D" cell batteries