whats the difference between the ST1 and the B2?
GREGORY T About $200.
Not enough info here to tell. I can tell you I've used a B2 with a M1
backup for 4 1/2 years in 30 degree freshwater and 85 degree
salt water to depths I should not have been at.
I've had a dozen regs. The B2 IS THE BEST.
Save yourself some cash. G.