I have not plunged it into water so cannot attest to it being waterproof, but If I go swimming with it, I will update the review. Specially since I can connect two devices at the same time. So I divided the third and stacked it to the first two! 5D or 10D works for me. The earbuds stay in your ear (shake test confirmed) so these are great for the gym. In the end I returned the item as I knew Id eventually have an accident squatting. com, Inc. Terrible product, terrible instructions. Fits nicely on my counter too! 1 surround sound with a 50mm driver.