I've been using the blue headphones while wading because I kayak to my detecting spots and I don't want to dunk a pair of the black ones that are not waterproof. I just can not get used to the tones on the blue ones. They make a bottle cap sound like a coke can and seem to only have 2 tones instead of 3. My productivity has taken a nosedive! I'm going back to the black ones and will just have to be careful about getting them wet. Anyone else have similar problems with the blue ones?