I think, so sorry if I'm wrong .....
Once you set the rof bps hit 'power' then if you get 3 green flashes you have saved, if you get 3 reds then it's rejected
Exit setup mode and it's saved
You should then be able to power off / on and have the settings you saved
If / when you change battery or remove the battery for storage I'm not sure if it will keep your settings or reset to default