Kuizil C16 wireless in-ear earbuds, Bluetooth 5.4 listed

Kuizil C16 wireless earbuds are listed as in-ear Bluetooth headphones for exercise and everyday listening. The listing claims up to 8 hours per charge and 50 hours with the charging case, alongside touch controls and water resistance. Customer feedback is positive on sound, fit and battery life, though reported playback from the case is not uniform with the headline figure.

At a glance

The listing claims up to 8 hours of music per charge and up to 50 hours with the charging case.
A case display is claimed to show battery status for the earbuds and case.
Four built-in ENC microphones are claimed for calls, with touch controls for music and calls.
The earbuds are described as having an ergonomic curved fit and three sizes of silicone tips.

Price

£23.99Save 80%

Reference price: ~~£119.89~~

Price checked: 14 Nov 2026

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Pros and cons

Pros

The claimed charging-case total is suited to buyers who want fewer charging stops between outings.
Touch controls are described for playback, calls, volume and track changes.
The stated 3g weight per earbud and multiple tip sizes offer fit options for workouts.

Technical specifications

17 specifications

Identity
Brand	Kuizil
Model	C16
Colour	Star Black

Connectivity and controls
Wireless connection listed	Wireless
Bluetooth version	5.4
Bluetooth range	15 Metres
Control methods listed	Touch

Audio
Driver type	Dynamic Driver
Driver size	14 Millimetres
Noise control	Environmental Noise Cancellation

Battery and charging
Playback on one charge	up to 8 hours
Total playback with charging case	50 hours
Charging interface	USB Type C

Dimensions and installation
Form factor	In Ear
Earbud weight	3g

Materials and protection
Water resistance listed	Waterproof
Enclosure material	Plastic

What to know before buying

Listing details to confirm

Listing details are inconsistent: the title and feature copy specify Bluetooth 5.4, but another feature comparison refers to Bluetooth 5.3. Battery statements also vary: the listing claims up to 8 hours per charge and 50 hours with the case, while customer feedback mentions 40 hours from the case. Treat these as claims rather than guaranteed results. The stated IPX7 protection is not independently confirmed here, so check the selected listing for its exact water-resistance details and usage conditions.

What’s in the box

Included

Charging box × 1
Soft silicone ear caps × 6 (L/M/S)
USB-C cable × 1
User manual
Wireless Bluetooth earbuds × 2

Who is it for?

A good fit for

Gym, running and outdoor exercise buyers seeking in-ear earbuds with touch controls and a claimed water-resistant design.
Listeners who want a charging case and a stated long total-playback claim for commuting or daily use.

Less suited to

Buyers who need independently confirmed Bluetooth specifications, battery runtime or water-resistance performance.

Kuizil C16 wireless in-ear earbuds, Bluetooth 5.4 listed · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.3 / 5 · 11,455 ratings

5 stars69%69%
4 stars15%15%
3 stars7%7%
2 stars3%3%
1 star6%6%

Customer feedback highlights sound quality, call clarity, secure fit, comfort and battery life. One reported case-playback figure is 40 hours, below the listing's 50-hour total claim, so buyers prioritising long intervals between charges should treat the higher figure as a claim rather than an assured result. Overall ratings are mostly five-star, but a meaningful spread of lower ratings means experiences are not uniform.

Positive themes

Customer feedback describes clear music playback and good call clarity.
Feedback mentions a secure fit, comfort and positive battery-life experiences.

Frequently asked questions

How long does the Kuizil C16 battery last?

The listing claims up to 8 hours of playback per charge and up to 50 hours total with the charging case. Customer feedback also mentions 40 hours from the case, so actual runtime is not established as a single consistent figure.

Which Bluetooth version does the C16 use?

The title and main feature text list Bluetooth 5.4, but a feature comparison also mentions 5.3. The listing is inconsistent, so confirm the version for the selected item.

Can these earbuds be used for workouts?

They are described for gym and outdoor training, with an ergonomic fit and silicone tips in three sizes. Water resistance is listed, but the exact protection claim should be checked before exposure to water.

What is included in the box?

The stated contents list includes a charging box, six silicone ear caps, a USB-C cable, a user manual and two earbuds. The listing's case-related details are not fully consistent, so check the selected package contents.