Well I never got mine to work so I brought it back to Old Salt Marine where I was price gouged for it, but I wanted it in a hurry so I ate it. The guy walks in the back and (supposedly) makes a call to tiny tach then comes out and tells me he just spoke to a woman there. Then tells me that since they don't give refunds on electronics that tiny tach told him they will not only refund my money, but pay for shipping as well. All this turned out to be BS. I called the number he gave me and spoke to the woman he supposedly talked to 1 hour before. She sounded confused and told me there is no way she can refund my money since I didn't actually buy it from them. I couldn't argue because I was wondering the same thing. However she then tells me that even though she can't refund my money she can send me there new programable model that she knows will work with my motor for free to make me happy. Well that actually did make me happy, how many companies would send you a replacement product with no real record of your original purchase. So I ask if I should mail my tiny tach back to her when I get the package, she responds by telling me to just throw it out, or if I want I can give it to a friend that has a Mercury since she knows my model number works well on them . I'll try it out as soon as I get it, but would like to say I am pleased with the customer service I am recieving from them. I will however never give old salt marine my business again.