Willen is the mighty portable speaker that is made to go everywhere with you. A top-of-class IP67 dust- and water-resistace rating means it's always ready for the road. 15+ hours of listening on a single charge and mounting strap means that Willen is raring to go wherever you go Take Marshall Sound With You, Everywhere. Design That Shakes Off The Elements. 15+ Hours Of Playtime. Attach Anywhere With The Strap.