Acjohtin YYK-790-Black Sleep Earbuds for Side Sleepers

Sleepers: Acjohtin YYK-790-Black sleep earbuds are compact in-ear wireless earphones presented for side sleeping. The listing claims a low-profile shape, single- or dual-ear use, built-in white noise, and up to 7 hours of battery life, though it does not give a measured fit guarantee for every sleeper.

At a glance

The listing describes a slim, contoured design intended to reduce contact between earbuds and a pillow.
Supports using one earbud or both, according to the listing.
Built-in white noise is listed as an additional feature.
Soft silicone ear tips are claimed to provide passive noise isolation of up to 24dB.

Price

$36.99Save 69%

Reference price: ~~$119.99~~

Price checked: Nov 12, 2026

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Pros and cons

Pros

The low-profile design and single-ear option give side sleepers flexibility in how they wear the earbuds.
Built-in white noise offers a listening option without relying only on audio streamed from another device.
Bluetooth connectivity avoids a wired connection while sleeping.

Cons

The listed 7-hour battery life may not cover longer sleep periods without recharging.
The technical listing gives an audio latency of 200 milliseconds, a potential drawback for video watching.

Technical specifications

30 specifications

Identity
Brand	Acjohtin
Model	YYK-790-Black
Color	Solid Black

Connectivity and controls
Wireless connection listed	Bluetooth
Bluetooth version	6.1
Bluetooth range	15 meters
Control methods listed	Push Button, Touch
Headphone jack	No Jack
Charging interface	USB Type C

Audio
Driver type	Dynamic Driver
Driver size	16.2 millimeters
Impedance	16 ohm
Frequency response	200 KHz
Sensitivity	88 db
Audio latency	200 milliseconds
Noise control	Environmental Noise Cancellation
Additional noise control feature	Wind Noise Reduction

Power and battery
Battery life listed	7 hours
Battery charge time	30 minutes

Dimensions and design
Form factor	In Ear
Weight listed	1.6 ounces
Additional features	Built-In White Noise, Lightweight 3g Design, Single or Dual Ear Use, Soft Silicone Ear Tips, Ultra-Flat Profile
Earbud shape	Bud
Style	Classic

Materials and protection
Water resistance listed	Waterproof
Earbud enclosure material	Plastic

Case dimensions
Length	3 centimeters
Case weight	65 g

Other listing details
Age range	Adult
Warranty description	2 Year Manufacturer

What to know before buying

Listing details to confirm

Listing details are inconsistent or unconfirmed: the description calls each earbud 3g, while the weight field lists 1.6 ounces without clarifying whether that is for one earbud, both, or the full set. Battery life is listed as 7 hours without a stated test mode, and the frequency response is given as 200 KHz without a range. Treat the environmental noise cancellation and waterproof claims as listing claims, not verified ratings.

What’s in the box

Included

2 Bluetooth 6.1 sleeping earbuds
Cable
User manual
Wireless charging case

Who is it for?

A good fit for

Side sleepers looking for small, wireless earbuds with a low-profile shape.
People who want the option of built-in white noise or single-ear listening at bedtime.
Buyers whose sleeping routine fits within the listed 7-hour battery life.

Less suited to

People who need a specified longer runtime for overnight use.
Buyers who need a clearly stated waterproof rating or confirmed noise-cancellation performance.

Acjohtin YYK-790-Black Sleep Earbuds for Side Sleepers · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.8 / 5 · 25 ratings

5 stars94%94%
4 stars0%0%
3 stars0%0%
2 stars6%6%
1 star0%0%

The supplied evidence contains aggregate ratings but no customer-comment summary. The ratings lean positive overall, but the small rating base and some lower-star feedback limit what can be concluded about comfort, overnight fit, or real-world battery life.

Frequently asked questions

Are these earbuds described for side sleeping?

Yes. The listing presents their slim, contoured in-ear design as intended for side sleepers, but individual comfort can vary.

How long is the listed battery life?

The product details list 7 hours. The listing does not specify the operating conditions behind that figure.

Can they be used in one ear only?

Yes. Single- or dual-ear use is listed as a feature.

Do the earbuds have active noise cancellation?

The listing uses the term Environmental Noise Cancellation and separately claims up to 24dB of passive isolation from the silicone ear tips. It does not provide independent verification or a clear technical explanation of the cancellation claim.