2m cable has the 3. Excellent product, very comfortable and suit my Under Armour wardrobe The second pair didnt even last a full run! The sandals are very comfortable. These have been through mud and woods and streams and they still look and feel amazing. Folds up nicely against the wall when not in use. Loved the sound quality and battery?s life. * Customer support has been fantastic. If you intend on standing in them all day, find something else; these arent going to work for you, as the sole is hard and without any give. The unit is too heavy to send back so we put it together and patched up the cracks etc as best we could.