Quality waterproof headphones with "in the ear design". For use with Aquapac MP3 Player Case. Great sound above and below the waterline. Headphones have been tested to a depth of 10m - 30ft - but they are not suitable for use at depths greater than 10ft - 3m where pressure may cause hearing damage. Comes with 3 sizes of spare ear buds. Plug Jack is a 3.5mm gold plate plug.