Ultimate Ears WonderBoom 4 Portable Bluetooth Speaker

The Ultimate Ears WonderBoom 4 is a compact, floatable Bluetooth speaker that delivers surprisingly big 360-degree sound and up to 14 hours of battery life in an IP67-rated, travel-ready package.

The WonderBoom 4 in Active Black blends rugged durability with clearer vocals and louder bass than its size suggests. It’s built to resist water, dust, and drops while offering handy modes for outdoor listening and spoken-word clarity. Lightweight and loop-equipped, it’s meant to move with you from shower to pool to patio without sacrificing sound quality.

How does the WonderBoom 4 improve sound for outdoor use?

WonderBoom 4 includes an Outdoor Boost button that increases volume and projection so music carries farther in open spaces. There’s also a new Podcast Mode to emphasize midrange and vocal detail, making conversations and spoken content easier to follow when you’re outside.

• Outdoor Boost for louder, wider projection
• Podcast Mode enhances vocal clarity and midrange
• 360-degree driver design for uniform sound distribution
• Pair two units for expanded stereo coverage

What durability and water protection does it offer?

The speaker is IP67-rated, so it resists dust and can be submerged up to one meter for 30 minutes, making it suitable for poolside or beach days. Its rugged build is drop-tested to 1.5 meters and includes dirt-resistant materials and a carrying loop to secure it on the move.

• IP67 waterproof and dustproof rating
• Floats in water for convenient retrieval
• Drop-tested from 5 ft / 1.5 m for impact resistance
• Loop attachment for hanging or clipping on gear

How long will the battery last and what connectivity options are available?

The internal battery provides up to 14 hours of continuous playtime on a single charge, enough for a full day of listening. Bluetooth connectivity supports a stable wireless range of approximately 131 feet (40 meters), letting you keep your phone or source device nearby without staying tethered to the speaker.

• Up to 14 hours of playback per charge
• Bluetooth wireless range up to 131 feet / 40 meters
• Easy pairing with two WonderBoom 4 units for doubling or stereo
• Simple button controls for mode switching and volume

What sustainability or eco features does the WonderBoom 4 include?

Ultimate Ears has incorporated post-consumer recycled plastic into the WonderBoom 4’s construction, reducing the product’s reliance on virgin materials. This choice supports a smaller environmental footprint without compromising durability or sound performance.

• Contains at least 31% post-consumer recycled plastic by weight in plastic parts
• Designed for long-term daily use to reduce disposability
• Repairable components help extend product life where possible

Who is this for? The WonderBoom 4 suits listeners who want portable, all-weather sound that won’t hold them back—campers, beachgoers, poolside hosts, and commuters who prefer rugged gear. It’s ideal for anyone who values straightforward wireless pairing, a full soundstage from a small footprint, and durable build quality with an eco-minded material choice.