CMF BY NOTHING Speaker S Portable Bluetooth Speaker, 45mm Driver

CMF BY NOTHING Speaker S is a compact portable Bluetooth speaker with a 45mm full-range driver and claimed 10W RMS output. Its IP68 dust and water resistance, USB-C audio connection, and stated playback of up to 18 hours at under 50% volume suit portable listening, with the runtime condition important for trip planning.

At a glance

Manufacturer claims IP68 dust and water resistance and submersion up to 1.5m for up to 30 minutes.
Claimed playback is up to 18 hours at under 50% volume. A 10-minute charge is said to provide up to 1 hour, with a full USB-C charge taking approximately 2.5 hours.
Bluetooth 6.0 is listed with a stated range up to 100m in free space. USB-C audio is claimed to have 60ms latency.
The Nothing X app offers sound presets and Custom EQ, according to the listing.
Stereo Mode requires pairing two identical speakers. Auracast Party Mode is described for compatible speakers.

Price

$39.00Save 34%

Reference price: ~~$59.00~~

Price checked: Nov 14, 2026

View offer Ahead of Black FridayExplore the selection

Pros and cons

Pros

Small stated dimensions and 334 g listed weight make the speaker easier to carry than a larger tabletop unit.
USB-C audio offers a wired option for compatible devices, with the listing claiming 60ms latency for gaming and video.
IP68 protection and the integrated attachment point described in the listing support outdoor and carry-along use.
App EQ options and physical controls provide more than one way to adjust playback.

Cons

The listed maximum output is 10 watts, which may not suit buyers seeking high output for a large gathering.
The 18-hour playback claim applies at under 50% volume, so it should not be treated as a guaranteed runtime at louder settings.
Creating left and right stereo channels requires a second identical speaker.

Technical specifications

28 specifications

Identity and audio
Brand	CMF BY NOTHING
Model	CMF Speaker S
Driver type	Dynamic Driver
Driver size	45 millimeters
Maximum output power	10 watts
Frequency response	20 KHz
Audio output mode	Stereo
Number of audio channels	2
Speaker type	Multimedia

Connectivity and controls
Wireless connection listed	Bluetooth, USB
Wireless technology	Bluetooth
Control methods listed	App, Push Button
Compatible devices	Laptop, Smartphone
Audio latency	60 milliseconds
Maximum range	100 meters

Power and battery
Power configuration	Battery Powered
Battery information listed	1 Nonstandard Battery batteries required. (included)
Input voltage	5 volts

Dimensions and installation
Mounting types listed	Tabletop Mount
Dimensions	3.34"D x 5.13"W x 1.73"H
Weight	334 g
Speaker size	1.75 inches

Materials and protection
Enclosure materials	Acrylonitrile Butadiene Styrene (ABS), Polycarbonate (PC)
Water resistance listed	Waterproof
Additional features listed	Bass Boost, Dustproof, Stereo Pairing, USB Port, Waterproof
Color	Turquoise

Warranty
Warranty type	Limited
Warranty description	1 Year Manufacturer

What to know before buying

Battery life is claimed at under 50% volume. The manufacturer also states submersion up to 1.5m for up to 30 minutes. Treat these as stated operating conditions, not independent test results. Bluetooth range is specified for free space.

What’s in the box

Included

Safety information
Warranty information and user guide × 1
Speaker × 1

Who is it for?

A good fit for

Listeners wanting a compact speaker for travel, desk use, or small outdoor outings.
Buyers who want USB-C audio as an alternative to Bluetooth, including for gaming or video.
People who value dust and water protection and may later pair a second identical speaker for left-right stereo.

Less suited to

Buyers needing a high-output speaker for large spaces or loud parties.
Anyone expecting the claimed 18-hour playback at unrestricted volume.
Shoppers who want stereo left-right playback from a single unit.

CMF BY NOTHING Speaker S Portable Bluetooth Speaker, 45mm Driver · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 15 ratings

5 stars75%75%
4 stars13%13%
3 stars12%12%
2 stars0%0%
1 star0%0%

Aggregate ratings skew positive, with most ratings in the five-star category, alongside some three-star ratings. The sample is small and does not explain why people rated the speaker as they did. These figures alone cannot establish sound quality, durability, or battery performance. For buyers weighing those claims, the 10-watt listed output and volume-conditioned runtime are more useful concrete limits to consider.

Frequently asked questions

How long does the CMF Speaker S battery last?

The manufacturer claims up to 18 hours of music playback at under 50% volume. Runtime at other volume levels is not specified here.

Can one Speaker S create stereo left and right channels?

The listed Stereo Mode pairs two identical CMF Speaker S units to provide dedicated left and right channels.

Can it connect by cable?

The listing identifies USB connectivity and describes USB-C audio, including a claimed 60ms latency. Confirm that your source device supports compatible USB-C audio.

What water protection is claimed?

The manufacturer claims IP68 dust and water resistance and says the speaker can withstand submersion up to 1.5m for up to 30 minutes.