Name: Ultimate Ears WONDERBOOM 4 Blue
Brand: Ultimate Ears
SKU: 950594
Price: 72.99 EUR
Availability: InStock
Rating: 9.1 (3 reviews)

Review is 9,1 out of 10, based on 3 reviews.
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Ultimate Ears WONDERBOOM 4 Blue Main Image

Ultimate Ears WONDERBOOM 4 Blue visual supplier

Choose your speaker:

Blue

Choose the better speaker that provides more freedom of movement

Ultimate Ears BOOM 4

Better model

You can keep your smartphone up to 5m further from the speaker. This way, you can walk around freely with your smartphone in your pocket without the music stopping.

Color: Blue

Charger not included

Retail price

€ 99,-

€ 72,99

Delivered tomorrow

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Ordered before 23:59, delivered tomorrow for free

2 years warranty on your product

Free exchange within 30 days

Customers rate Coolblue 4.5/5

Active in the Netherlands since 1999

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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

Included by default

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

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Similar and better products

- Current product
  Ultimate Ears WONDERBOOM 4 Blue
- Ultimate Ears WONDERBOOM 4 Black
- Bose SoundLink Micro Black
- Retail price
  € 99,-
  € 72,99
- Retail price
  € 99,-
  € 73,99
- Retail price
  € 129,95
  € 104,90

Sound reproduction
- 360 degrees, Stereo
- 360 degrees, Stereo
- Mono
Maximum battery life
- 14 hours
- 14 hours
- 6 hours
Multi-speaker connectivity technology
- UE PartyUp
- UE BOOM
- Bose Connect
Integrated power bank
- No
- No
- No

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.

10 ()

Battery life

Review is 10 out of 10.

10 ()

Build quality

Review is 10 out of 10.

10 ()

Design

Review is 10 out of 10.

10 ()

Options

Review is 8,0 out of 10.

8,0 ()

Most helpful reviews

Review is 8,0 out of 10.

8,0/10 ()

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.

9,7/10 ()

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.

9,7/10 ()

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

Coolblue takes care of everything, from taking out an insurance to repairs
For almost all accidents
More coverage in case of damage than your standard warranty
No deductible

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.

2-year Protection Plan
€ 7,99
one-time
3-year Protection Plan
€ 8,99
one-time

Specifications

The list with properties are filtered when you type

Product

Product number	950594
Manufacturer code	984-001895
Brand	Ultimate Ears
Warranty	2 years
Processing of your defect	Carry-in warranty

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

	Maximum battery life	14 hours
	Integrated power bank

Water resistance

	Water resistance	Waterproof
	Waterproofness certification	IP certification
	IP certification	IP67

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 via app
	Controlled via buttons on device
	Remote control

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