- Marshall's Signature Sound serves up perfectly balanced audio with plenty of bass- Take your tunes anywhere with up to 17 hours of portable playtime- It's IP67 dust- and waterproof, so you can bring it along to the beach- Clip it, strap it, hang it - the handy fastening strap lets you secure it just about anywhere- Wirelessly connect to other Auracast speakers and fill your space with sound- Chat away on phone calls handsfree with the built-in microphone