Ultimate Ears Wonderboom 4

Name: Ultimate Ears Wonderboom 4
Brand: Ultimate Ears
SKU: 37936

Manufacturer: Ultimate Ears

The Ultimate Ears Wonderboom 4 is a compact portable speaker designed for everyday wireless listening. Built with a control panel directly on the device and support for stereo pairing, it offers straightforward usability whether at home or on the go. It carries a two-year warranty and connects via Bluetooth 5.2, with fast pairing support for quick device hookups.

On the technical side, the Wonderboom 4 is rated IP67, meaning it is dustproof and can withstand submersion in water up to one meter deep. Its four 40 mm drivers are complemented by a passive radiator, delivering a sound pressure level of 87 dB/mW. The speaker weighs 420 g and measures 104 mm in height with a 95.3 mm width and thickness. Charging is handled via USB Type-C, and the 14-hour battery life comes with a battery level indicator to track remaining charge.

Pros

IP67 rating means it is fully dustproof and can be submerged in water up to one meter deep, making it suitable for outdoor and wet environments
Bluetooth 5.2 with a 40-meter wireless range allows flexible placement without frequent dropouts
Fast pairing support reduces the time needed to connect a device
Stereo pairing lets two units be linked together for a wider soundstage
A passive radiator assists low-frequency reproduction without requiring a dedicated subwoofer
Battery level indicator helps users monitor remaining charge before it runs out

Cons

No support for advanced audio codecs such as aptX, LDAC, or AAC, which limits audio transmission quality
Wireless charging is not available, requiring a wired USB Type-C connection every time
No 3.5 mm audio jack or AUX input means wired audio sources cannot be connected directly
The battery is non-removable, so the unit must be taken out of use entirely when recharging
No mute function is available, which can be inconvenient during calls or sudden interruptions
A travel bag is not included, offering no dedicated storage or protection solution out of the box

Who is this for?

This speaker suits users who frequently take it outdoors or into environments where moisture and dust are a concern, thanks to its IP67 waterproof rating with submersion tolerance up to one meter. Its wireless operation, 40-meter Bluetooth range, and fast pairing make it a practical choice for casual listeners who want quick, hassle-free connectivity on the move. Those who occasionally listen with a friend will also find value in the stereo pairing capability, which allows two units to be paired for a wider sound spread.

Who is this NOT for?

Users who prioritize high-fidelity audio transmission will find this speaker limiting, as it lacks any advanced codec support including aptX, LDAC, and AAC, making it a poor fit for audiophile or high-resolution listening. It is also ill-suited for anyone who needs to connect via a 3.5 mm cable or AUX input, since no wired audio inputs are available. Additionally, users who rely on fast top-up charging or wireless charging will face limitations, as the speaker requires a wired USB Type-C connection and offers no alternative charging method.

Design:

Ingress Protection (IP) rating	IP67
volume	944.53736 cm³
drivers count	4
driver unit size	40 mm
has a neodymium magnet	✕
control panel placed on a device	✓
water resistance	Waterproof
travel bag is included	✕
has a touch screen	✕
warranty period	2 years
has RGB lighting	✕
has a detachable cable	✕
is a neckband speaker	✕
has a remote control	✕
weight	420 g
waterproof depth rating	1 m
height	104 mm
width	95.3 mm
thickness	95.3 mm

The Ultimate Ears Wonderboom 4 has a compact physical footprint, measuring 104 mm in height and 95.3 mm in both width and thickness, with a total volume of roughly 944.54 cm³ and a weight of 420 g. It carries an IP67 rating, confirming full dustproofing and waterproofing to a depth of one meter. The speaker houses four 40 mm drivers and features a control panel placed directly on the unit, making physical adjustments straightforward without any touchscreen or remote control. It does not include a neodymium magnet, RGB lighting, a detachable cable, or a travel bag, and it is not a neckband-style design. A two-year warranty is provided with the product.

Sound quality:

has a subwoofer	✕
Has a passive radiator	✓
sound pressure level	87 dB/mW
has a magnetic shielding	✕

The Wonderboom 4 achieves a sound pressure level of 87 dB/mW and makes use of a passive radiator to support low-frequency output. It does not include a dedicated subwoofer or magnetic shielding.

Power:

Battery life	14 hours
has a battery level indicator	✓
has a rechargeable battery	✓
has a removable battery	✕
has wireless charging	✕

The Wonderboom 4 runs on a built-in rechargeable battery rated for up to 14 hours of use, and a battery level indicator lets users keep track of remaining charge. The battery is not removable, and the speaker does not support wireless charging.

Connectivity:

Bluetooth version	5.2
supports Bluetooth pairing using NFC	✕
has a socket for a 3.5 mm audio jack	✕
has an AUX input	✕
has aptX Lossless	✕
has LDAC	✕
has aptX Adaptive	✕
has aptX HD	✕
has aptX	✕
has aptX Low Latency	✕
has AAC	✕
has AirPlay	✕
has Chromecast built-in	✕
has Auracast	✕
has Bluetooth LE Audio	✕
maximum Bluetooth range	40 m
supports Wi-Fi	✕
Has USB Type-C	✓
has a 3.5mm male connector	✕
has an external memory slot	✕
is DLNA-certified	✕
supports Ethernet	✕
has a microphone input	✕

The Wonderboom 4 connects wirelessly via Bluetooth 5.2 with a maximum range of 40 m, and uses USB Type-C as its only physical port. It does not support NFC pairing, Wi-Fi, AirPlay, Chromecast, Auracast, or Bluetooth LE Audio, and no advanced audio codecs are available, including aptX, aptX HD, aptX Adaptive, aptX Lossless, aptX Low Latency, LDAC, or AAC. There is no 3.5 mm audio jack, AUX input, 3.5 mm male connector, microphone input, external memory slot, Ethernet connection, or DLNA certification.

Features:

Can be used wirelessly	✓
supports a remote smartphone	✓
has fast pairing	✓
has voice commands	✕
Has a radio	✕
Has voice prompts	✓
has a mute function	✕
works as a power bank	✕
has a sleep timer	✓

The Wonderboom 4 operates fully wirelessly and supports smartphone remote control, allowing playback management from a connected device. It includes fast pairing for quicker Bluetooth connections and provides voice prompts to guide users through device operations. A sleep timer is also available. The speaker does not offer voice commands, a built-in radio, a mute function, or the ability to charge other devices as a power bank.

Miscellaneous:

supports pairing for stereo sound	✓

The Wonderboom 4 supports stereo pairing, allowing two compatible units to be linked together for a stereo sound setup.

Final Verdict

The Ultimate Ears Wonderboom 4 is a compact portable speaker built around a clear set of priorities: durability, wireless convenience, and ease of use. Its IP67 waterproof rating and 40-meter Bluetooth 5.2 range make it a reliable companion for outdoor and casual everyday use, while fast pairing and stereo pairing support add genuine practical value. Listeners with more demanding audio expectations — particularly those who rely on high-resolution codecs or wired connections — will find its connectivity and audio transmission options limited. Taken as a whole, the Wonderboom 4 delivers a focused, no-frills portable speaker experience that suits users who value ruggedness and simplicity over advanced audio features.