Works great with a few quirks
#2 Carry a strong magnet, as occasionally the Bluetooth will get confused and you can reset with magnet.
#3. It has a long battery life 3or 4 days. Depending on how many times you remove it.
#5. Fully adjustable from 0 - 24. Maintains pressure. Remembers your previous setting.
I’ve used in fresh, salt, and chlorine. NP. Just plug the charge port with small blob of swimmers wax. And use a wrap to keep your sleeve from getting wet and smelly.
Suction is easy and cheap but your limb will shrink FAST with more pistoning.