Marshall Signature Sound with Dynamic Loudness: Features Marshall signature sound with Dynamic Loudness that adjusts the tonal balance of the audio to ensure your music sounds brilliant at every volume True Stereophonic Multi-Directional Sound: Features True Stereophonic, a unique form of multi-directional sound from Marshall. Experience superior spatial and binaural sound that flows around you and fills any space Extended Battery Life: Offers 32+ hours of portable playtime on a single charge, so you can keep listening all day and into the next Rugged IP67 Dust and Waterproof Design: Boasts a rugged and robust design that can battle dust and downpours. With an IP67 dust and waterproof rating you can submerge it in 1 m (3 ft) of water for a period of up to 30 minutes, ensuring rain or dirt never gets in the way of your music Built-in Microphone and Bluetooth LE Audio-Ready: Comes with a built-in microphone, making hands-free talking much simpler and clearer. Built to be Bluetooth LE Audio-ready, this future-proof technology will open a new world of audio sharing possibilities with Auracast