The Dolphin is a total piece of crap. After running a short while it would go back and forth over a 10 foot section and that was all it would do. I took it back to Costco and they gave me a full refund with no questions asked.

I bought a Blue Pearl instead. It is cheaper and works much better. It has no remote, but none is needed as it makes random turns and cleans my entire 20 by 40 pool in about 2 hours.