Marshall signature sound: Take any setting from quiet to loud. Willen II's slightly larger frame maximises bass. Its improved drivers also give every frequency its time to shine, so you’ll hear a balanced sound at any volume. 17+ hours of portable playtime: Packed with hours of portable playtime on a single charge, Willen II transforms your world into a musical playground. This speaker will keep the music going from early morning to late at night. Dust and waterproof: This speaker doesn’t mind a swim and has an IP67 dust and waterproof rating so you can submerge it in 1 m (3 ft) of water for up to 30 minutes. Willen II won’t let rain or dirt get in the way of your music. Fastening strap: Stand it up, lay it down, fix it to an object or let it hang thanks to its rubber fastening strap. You can attach Willen II almost anywhere and blast out your favourite music to anyone who wants to hear it. Built-in microphone: Willen II lets you do the talking. It comes with a built-in microphone so that you can take calls completely hands-free. Just place your speaker down and catch up, without interrupting what you’re doing.