1 / 7Sony ULT Field 1 SRSULT10B Portable Bluetooth Speaker
Portable: The Sony ULT Field 1 SRSULT10B is a compact, battery-powered Bluetooth speaker with a bass-boost button, a listed 12-hour battery life and a strap described as adjustable. The listing claims water, rust, dust and shock resistance, while its technical details specify only water resistance, so check the protection rating for the exact model before relying on it outdoors.
At a glance
- ULT button is described as boosting bass for music playback.
- Up to 12 hours of battery life is claimed, with USB-C charging.
- The product feature text describes water, rust, dust and shock resistance, but the technical details only list water resistance.
- An adjustable two-way strap and hands-free calling are described in the feature text.
- The listing says two ULT Field 1 speakers can connect wirelessly for stereo sound.
Reference price: $229.00
Price checked: 13 Nov 2026
View offerAhead of Black FridayExplore the selectionPros and cons
Pros
- Battery power and Bluetooth connection support portable playback without a wired audio connection.
- A dedicated ULT button provides a listed bass-boost option.
- USB-C charging and an up-to-12-hour battery claim suit outings where charging access may be limited.
- Hands-free calling and playback controls are described as built-in functions.
Technical specifications
23 specifications| Brand | Sony |
|---|---|
| Model | SRSULT10B |
| Colour | Black |
| Audio output mode | Mono |
|---|---|
| Speaker type | Woofer, Tweeter & Passive Radiators |
| Audio driver | Dynamic Driver |
| Maximum output power | 5 Watts |
| Speaker size | 7.6 Centimeters |
| Audio channels | 1.0 |
| Wireless connection listed | Bluetooth |
|---|---|
| Connectivity technology | Bluetooth, USB |
| Control methods listed | Touch |
| Power configuration | Battery Powered |
|---|---|
| Battery life listed | 12 Hours |
| Battery | 1 Lithium Ion batteries required. (included) |
| Dimensions (D x W x H) | 7.6D x 20.6W x 7.7H centimetres |
|---|---|
| Weight listed | 650 Kilograms |
| Mounting type | Tabletop |
| Enclosure material | Plastic |
|---|---|
| Water resistance listed | Water Resistant |
| Additional feature | Plastic-free packaging with recycled plastics used in speaker and strap |
| Compatible devices | Laptop, Smartphone, Tablet |
|---|---|
| Warranty description | 1 year |
What to know before buying
Listing details to confirm
The listing conflicts or is unclear on protection: its feature copy claims water, rust, dust and shock resistance and manufacturer copy specifies IP67, while the technical details list only water resistance. The listed weight of 650 Kilograms is inconsistent with the compact-speaker description. Confirm the exact protection rating and weight for the selected model before buying. Battery life is stated as up to 12 hours, not a guaranteed runtime.
Who is it for?
A good fit for
- Listeners wanting a portable mono speaker with Bluetooth, battery power and a selectable bass boost.
- Buyers who value a stated long battery life and USB-C charging for occasional outdoor use.
- People seeking a speaker that also supports hands-free calling.
Less suited to
- Buyers who need confirmed stereo playback from one speaker or a verified protection rating for demanding wet or dusty conditions.
- Anyone needing a dependable published product weight, since the listed weight is inconsistent with the compact design.
Customer reviews on Amazon
- 5 stars
100% 100% - 4 stars
0% 0% - 3 stars
0% 0% - 2 stars
0% 0% - 1 star
0% 0%
The supplied evidence contains aggregate ratings but no written customer feedback. The ratings are uniformly five-star in a small sample, which is a positive snapshot but cannot establish specific strengths, concerns or likely performance. Consider the listed mono audio, battery claim and unresolved protection details against your needs.
Frequently asked questions
How long is the claimed battery life?
The listing gives up to 12 hours. Actual runtime is not specified for particular volume levels or conditions.
Is the speaker waterproof?
The listing's technical details say water resistant, while feature copy claims broader resistance and manufacturer copy specifies IP67. Confirm the protection rating for the selected model before relying on it.
Can it play stereo sound?
The listed audio mode is mono. The listing says two ULT Field 1 speakers can be connected wirelessly for stereo sound.
What devices are listed as compatible?
The listing names laptops, smartphones and tablets.
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