As the WF-SP900 headphones are water- and dustproof according to the IP65 / IP68 standards, and even include internal memory, music can be enjoyed anywhere – be it in the water, while exer­cising or on the go. They do completely without cables for free, undisturbed movement and thus also eliminate cable noise, which would otherwise impair the hearing pleasure. The headphones also feature an ambient sound mode, allowing the user to listen to the immediate environment, voices and music in a well-balanced mix.