Sampling frequency can be set to 0.1 seconds if you want. Even 0.025 seconds. However, at higher sampling rates, some problems occur:
- Depth display becomes less stable (i.e. oscillates between 25.2m and 25.3m very rapidly)
- Depth display becomes a bit less accurate, especially on rapid descents (since the pressure sensor response time 'lags' behind your actual depth)
If there are any other features you want, just say so. One feature which I thought would be cool would be to have the depth gauge talk, and tell you your depth as you cross each 10m mark (i.e. it says 'TEN METERS..', then 'TWENTY METERS'...). It could also 'call out the times' during the dive ('ONE MINUTE TEN SECONDS..')
Of course, you could have different languages programmed in. I'm not sure if this will happen on the first version, but since the software is upgradeable it could be added later.
I was laid off work two weeks ago, so I'm working on freediving projects full time now. I don't have that much money saved up, but hopefully enough to finish a few projects. However, without a job, I can't afford to use the approach I used with the fluid goggles. In other words, I actually need to make a profit off the devices in order to put food on the table and pay my bills.