I purchased a Blue Cable for our Dolphin 300S and an electrical Power Cord the same time. One of our cords was chewed up by 2 new puppies and the other blue cord was just weathered really bad and cracked and broke when it was hit with a weed trimmer. I received both of the items quickly. The power cord hooked up easily and the blue cable took a few minutes but was easy to change out. I didn't realize until after we received the blue cord that there was a difference in the end. You have a 2-pin cord and a 3-pin cord. I was skeptical about plugging it in and dropping it in the pool until I researched a little. I found that the 2-pin plug will work just fine. The 3-pin plug is for remote control communication I believe. We don't use that so it really didn't make any difference for us. The price was very affordable for both cords. I was able to replace both cords for under $100. That was a significant savings compared to other websites. We are very pleased with our purchase.
