Furuno FS-2570 - Page 209

7.1 Output power
7-7
10. Repeat from step 6 for another user channel.
11. Move the cursor over SAVE TX POWER and press [ENT] to save the data.
12. Select YES and press [ENT].
Factory default setting
To select factory default;
1. Move the cursor over ERASE TX POWER and press [ENT].
2. Select YES and press [ENT].