WONDERBOOM 4 Portable Waterproof Bluetooth Speaker - Big Bass, 360

In this review the WONDERBOOM 4 is evaluated as a compact, rugged Bluetooth speaker for outdoor and everyday use. The bottom line: it is best for listeners who want surprisingly big, room-filling sound from a small, travel-ready package and a reliable battery that lasts through long outings. The speaker's claim to fame is its boosted 360-degree sound and an easy Outdoor Boost button that noticeably increases presence in open-air settings, while Podcast Mode clarifies voices for spoken-word listening.

Key Features

• 360-degree sound: Delivers fuller sound from a petite body so music fills small gatherings without careful placement.
• Outdoor Boost and Podcast Mode: Outdoor Boost increases projection for parks and beaches, and Podcast Mode enhances vocal clarity for spoken content.
• 14 hours playtime: A battery that lasts most of the day lets you move between activities without frequent recharging.
• IP67 waterproof and dustproof: Rated to be submerged to 1m for 30 min and protected from dust, making it suitable for poolside, shower, or sandy environments.
• Floatable and durable: The speaker floats and is dirt-resistant and drop-tested from around 5 ft, easing concerns about outdoor bumps and spills.
• Stereo pairing: Two units can be paired to provide true left and right channels for wider stereo sound.

Who It's For

The WONDERBOOM 4 is ideal for people who want portable audio that survives outdoor conditions and still sounds bigger than its size suggests, such as beachgoers, campers, or anyone who moves between indoor and outdoor listening. Its lightweight design and loop make it convenient for travel, pool days, and backyard gatherings.

It is less well suited for audiophiles seeking deep low-end extension or users who need multiroom wireless integration beyond simple stereo pairing. If you need extended battery life beyond a day or advanced streaming features found in larger systems, look elsewhere.

Pros & Cons

Pros

• Surprisingly big, balanced 360-degree sound from a compact speaker.
• Durable, IP67-rated construction that is dustproof, waterproof, and floats.
• Portable battery life of up to 14 hours covers a full day of outdoor use.
• Easy stereo pairing doubles soundstage when using two speakers.

Cons

• While bass is boosted for size, it cannot match the deep lows of larger speakers.
• Feature set focuses on portability and durability rather than advanced smart integrations.

Specifications

Brand	Ultimate Ears
Sound	Surprisingly bigger 360-degree sound with boosted bass
Battery life	Up to 14 hours
Water and dust rating	IP67 (submersible to 1m for 30 min)
Wireless range	Approximately 131 ft (40 m)
Durability	Floatable, dirt-resistant, drop-tested from 5 ft (1.5 m)
Materials	Includes minimum 31% post-consumer recycled plastic

Our Verdict

The WONDERBOOM 4 is a strong value for listeners who prioritize portability, ruggedness, and surprisingly full 360-degree sound in outdoor settings. It pairs useful listening modes like Outdoor Boost and Podcast Mode with a practical 14-hour battery and an IP67 build, making it an excellent pick for casual music lovers who want reliable, travel-ready audio without extra complexity.

Frequently Asked Questions

Can the speaker be used in the pool?
Yes, it is IP67-rated and floatable, so it can be used at the pool and can be submerged to 1 m for 30 minutes.

How long does the battery last?
The battery provides up to 14 hours of playtime under typical listening conditions.

Can two units be used for stereo?
Yes, pair two WONDERBOOM 4 speakers to double the sound or enable true left and right stereo channels.