• 【Marshall Signature Sound】It plays a small, yet powerful martial signature sound. Better bass and overall acoustic performance than previous models. Upgraded drivers make every frequency more evenly and enjoy balanced sound at any volume. Willen II outperforms its size • Up to approx. 17 hours of continuous playback: A single charge allows for up to 17 hours of music playback. Its compact size, durability and reliable playtime make it a must have on the go. When the battery runs out, it only takes 2.5 hours to fully charge. Supports fast charging and provides 5.5 hours of playtime with 20 minutes of charging so you can resume your listening sessions immediately • Dustproof and Waterproof: Highly durable and easy to use. Combining the iconic Marshall design and ruggedness the Willen II will take you tough without worrying about getting wet. IP67 dustproof and waterproof, it can be submerged in 1 meter (about 3 feet) water for up to 30 minutes • 【SECURE STRAP】 The ultimate multi-purpose speaker that can be used to stand upright, lie down, secure to objects, or hang with the elastic strap provided, you can take the Willen II anywhere and share your favorite track with anyone • Built-in Microphone: Equipped with a built-in microphone for complete hands-free calls. Place the speaker anywhere you want to enjoy conversations. Whether you're on the morning or before a night out, it won't get in the way