COTOE K9 Wireless In-Ear Earbuds

COTOE K9 wireless in-ear earbuds are listed with touch controls, a 14.2 mm dynamic driver and a claimed 100-hour total battery life. The listing also promotes Bluetooth 6.0, ENC call noise cancellation and water resistance, but gives conflicting Bluetooth-version details and no customer-comment summary.

At a glance

The listing claims up to 8 hours of playback per side and up to 100 hours of music playback with the case. These are different operating figures, not a single uninterrupted listening estimate.
A 14.2 mm dynamic driver and environmental noise cancellation are listed. The description frames ENC as a call-noise feature, not active noise cancellation for listening.
Touch control and USB-C charging are listed, with in-ear fit and a claimed 3g per earpiece.

Price

£12.99Save 24%

Reference price: ~~£16.99~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

USB-C charging and touch controls are specified.
The listing gives both earbud and case dimensions and weights, useful for assessing portability.

Technical specifications

29 specifications

Identity
Brand	COTOE
Model	K9

Audio and connectivity
Wireless connection listed	Bluetooth 6.0 Earphones, Wireless
Bluetooth version	6.0
Bluetooth range	10 Metres
Driver type	Dynamic Driver
Driver size	14.2 Millimetres
Control methods listed	Touch
Headphone jack	No Jack
Charging interface	USB Type C

Power and battery
Battery life listed	100 Hours
Claimed playback per side	8h playback per side
Claimed total music playback with case	100h music
Claimed total talk time with case	80h talk
Charge time	1.5 Hours

Dimensions and fit
Form factor	In Ear
Weight listed	3 Grams
Earbud weight claim	3g per earpiece
Carrying case length	61 Millimetres
Carrying case width	52 Millimetres
Carrying case height	22 Millimetres
Carrying case weight	30 Grams

Materials and protection
Water resistance listed	Waterproof
Additional water-resistance claim	IPX7 Water Resistance
Colour	Deep Brown
Carrying case colour	Black

Other listed details
Noise control	Environmental Noise Cancellation
Warranty	2 year manufacturer
Spare part availability duration	10 Years

What to know before buying

Listing details to confirm

Bluetooth details conflict: the title and specification fields say Bluetooth 6.0, while promotional copy compares the product with Bluetooth 5.3 and describes that as the earbuds’ version. The 100-hour figure is a case-inclusive music claim, alongside 8 hours per side and 80 hours of talk time. Water resistance is variously labelled “Waterproof” and IPX7. Confirm the selected listing’s exact version, battery conditions and water-resistance rating before relying on them. The 3 Grams item weight and 3g-per-earpiece claim also do not clearly specify the same measurement basis.

What’s in the box

CableIncluded
EartipIncluded
User manualIncluded
EarbudsCheck selected pack
Charging caseCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

Buyers looking for compact, touch-controlled in-ear wireless earbuds with USB-C charging.
People considering earbuds for commuting, gym use or cycling who want a claimed long case-inclusive battery life and ENC for calls.

Less suited to

Buyers who need confirmed Bluetooth specifications or verified water-resistance conditions before purchase.
Listeners seeking a substantiated active noise-cancelling specification for music playback.

COTOE K9 Wireless In-Ear Earbuds · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 29 ratings

5 stars81%81%
4 stars13%13%
3 stars6%6%
2 stars0%0%
1 star0%0%

The supplied evidence includes aggregate ratings but no customer-comment summary. The distribution is mostly five-star with some four- and three-star ratings, which suggests generally favourable ratings in this limited sample but does not identify what buyers liked or disliked. It cannot confirm the listed Bluetooth version, battery claims or water resistance.

Frequently asked questions

How long does the COTOE K9 battery last?

The listing claims 8 hours of playback per side and up to 100 hours of music playback with the case. It also states 80 hours of talk time with the case. These figures describe different uses and include the case for the longer totals.

Does the K9 have Bluetooth 6.0?

The title and specification fields say Bluetooth 6.0, but the product copy also refers to Bluetooth 5.3. The listing is inconsistent, so confirm the version for the selected item.

Are these earbuds water resistant?

The listing says “Waterproof” and separately claims IPX7. It does not establish the conditions under which that protection applies, so check the selected listing before exposure to water.

What comes in the package?

The details list a cable, eartip and user manual. Promotional copy additionally claims one pair of earbuds and a charging case, so check the selected package listing for those items.