Ultimate Ears WONDERBOOM 4 Blue

Ordered before 23:59, delivered tomorrow for free

Ordered before 23:59, delivered tomorrow for free

Ordered before 23:59, delivered tomorrow for free

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Product information
Similar and better products
Recommended combination
Reviews
Insurance
Accessories
Specifications

Product information

Pros and cons

According to our Bluetooth speaker expert

Thanks to the 360-degree sound, you hear the music clearly from anywhere in the room.
The Outdoor Boost allows you to hear powerful sound and you clearly hear the voices in Podcast Mode.
You can easily use the speaker at the beach, thanks to the IP67 certification.
You can't charge your smartphone to the speaker, because it doesn't have a power bank.

Description

Enjoy a 360-degree sound with the Ultimate Ears WONDERBOOM 4 Blue. You hear sound from every side of the speaker, so it doesn't matter where you sit to hear the music well. With the Outdoor Boost button, you can amplify the sound. This way, you can also hear it clearly when you're outdoors with a lot of ambient noise. If you're listening to a podcast, use the Podcast Mode so voices sound more clearly. The speaker has an IP67 certification, which makes it dustproof and water-resistant so you can easily use it by the beach or at the pool. You can listen to your music or podcasts the entire day, thanks to the 14-hour battery life. Connect a second WONDERBOOM 4 speaker for stereo sound.

Tips for using this product

This is what you get

USB-C charging cable

Key specs

	Maximum battery life	14 hours
	Weight	0,42 kg
	Wireless speaker size	Mini (0 - 10cm)
	Water resistance	Waterproof
	IP certification	IP67
	Built-in WiFi
	Controls via app
	Water-resistant

Show all specifications

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  Ultimate Ears WONDERBOOM 4 Blue
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Sound reproduction
- 360 degrees, Stereo
- 360 degrees, Stereo
- 360 degrees
- Mono
Maximum battery life
- 14 hours
- 14 hours
- 17 hours
- 6 hours
Multi-speaker connectivity technology
- UE PartyUp
- UE BOOM
- Auracast
- Bose Connect

Show full comparison

Reviews

Rating

5 stars

4 stars

3 stars

2 stars

1 star

Rating per section

Sound quality

Review is 10 out of 10.

Battery life

Review is 10 out of 10.

Build quality

Review is 10 out of 10.

Design

Review is 10 out of 10.

Options

Review is 8,0 out of 10.

Most helpful reviews

Review is 8,0 out of 10.

Good sound, solid design, sometimes a bit clumsy operation

Sturdy, waterproof
Good sound
Battery life
Controls a bit vague

Nice speaker for on the road and on vacation. Nice sound, sturdy and waterproof. Due to the minimalist design it is sometimes difficult to find certain functions (e.g. battery level, connected devices)

Jan
4 March 2025
Automatically translated from Dutch

Review is 9,7 out of 10.

Compact box with nice clear sound

Compact
Loud
Bright
At very loud sound it becomes a little less beautiful

It is exactly what I expected for the price. A small box that is easy to carry and gives a very nice sound

Christos
31 March 2025
Automatically translated from Dutch

Review is 9,7 out of 10.

Really A Little MonsterBoom

Rugged design
360 degree surround sound
Deep bass in small size
Less options to connect with an mobile app

I love it, this is my favourite portable speaker ever

Girish
11 August 2025

Insure your Bluetooth speaker

Receive more coverage in case of damage than with your standard warranty. Coolblue takes care of everything: from taking out the insurance to repairs. Is a repair not possible? You receive the purchase price as CoolblueCredit.

What am I insured for?

Fall and impact damage
Water damage
Manufacturing defects outside the warranty

What am I not insured for?

Damage you deliberately cause
Damage that doesn't affect the product functioning (such as scratches)
Damage due to gross negligence

XCover insurace

XCover is allowed to arrange and process insurances on behalf of the insurer. The insurances are governed by Belgium law. If you have a complaint, you can contact the or our customer service.

How do I insure my Bluetooth speaker?

First, add your Bluetooth speaker to your shopping cart. On the next page, choose the Protection Plan below. You always have a 30-day return window and pay no deductible in case of damage.

XCover Protection without theft cover

2-year advance payment
7,99 one-time payment (4,- per year)
3-year advance payment
8,99 one-time payment (3,- per year)

The insurance can be canceled every year, even if you have paid in advance. If you cancel earlier, you will receive a refund for the overpaid amount.

Specifications

Product

Product
	Product number	950594
	Manufacturer code	984-001895
	Brand	Ultimate Ears
	Warranty	2 years
	Processing of your defect	Via Coolblue

Physical properties

Physical properties
	Speaker type	Bluetooth speaker, Wireless speaker
	Width	9,53 cm
	Depth	9,53 cm
	Height	10 cm
	Wireless speaker size	Mini (0 - 10cm)
	Weight	0,42 kg
	Color	Blue
	Integrated light effects
	Built-in microphone

Power supply

Power supply
	Maximum battery life	14 hours
	Integrated power bank

Water resistance

Water resistance
	Water resistance	Waterproof
	Waterproofness certification	IP certification
	IP certification	IP67

Network and streaming

Network and streaming
	Bluetooth
	Built-in WiFi
	NFC
	Multi-room audio
	Plays from network
	Radio
	Multi-speaker connectivity technology	UE PartyUp
	Headphone jack
	Sound reproduction	360 degrees, Stereo

Controls

Controls
	Controls via app
	Controlled via buttons on device
	Remote control

Durability

Durability
Quality mark sustainable product	FSC certified packaging material
Product contributes to sustainability	This product helps you separate trash
Green production features	Partly made of recycled material

This is the one

Ultimate Ears WONDERBOOM 4 Blue

Review is 9,3 out of 10, based on 4 reviews.

anything for a smile

Ordered before 23:59, delivered tomorrow for free

Ordered before 23:59, delivered tomorrow for free