chalvh Bluetooth 5.4 Wireless Earbuds with ENC, 48H Playtime, USB-C Fast Charge & IP7

The essentials

chalvh’s wireless earbuds are built around the basics most people actually care about: stable Bluetooth connection, clear call audio, and a battery life that doesn’t force you to charge every day. On paper, they lean on newer Bluetooth features (Bluetooth 5.4) plus ENC noise cancelling for calls, and they’re also described as waterproof to IP7.

A key part of the pitch is that they’re not just “connect and hope” earbuds. The Bluetooth 5.4 section mentions LE 2M PHY coded for improved signal reliability and anti-interference, and support for the LE Audio LC3 codec to carry higher-quality audio at lower bit rates. That’s the sort of detail that can help if you’re often walking around with your phone in pockets or busy spaces where connections tend to get flaky.

What you’ll notice in everyday use

If your priority is day-to-day listening, the claimed battery setup is one of the more practical selling points. The earbuds are said to deliver up to 8 hours of music on a single charge, with up to an additional 40 hours from the charging case. Recharging is via USB-C fast charge (with a stated “up to 1.5 hours” figure for a full top-up, based on the information provided).

There’s also a claimed LED digital display on the charging case so you can see battery status in real time. That might sound like a small convenience, but it’s genuinely useful if you’re the type to forget where you left the case charged.

For calls, the idea here is ENC noise cancelling paired with four microphones. The manufacturer also notes two 13 mm drivers and claims they can capture mid-range and bass better than simpler driver setups—again, useful if you mainly use your earbuds for podcasts, calls, and everyday music rather than studio-grade listening.

Quick micro-scenario: you’re commuting with your phone in your bag. You take the earbuds out, open the case lid, and they’re described as pairing automatically thanks to an advanced Hall switch. In that moment, the “one less thing to do” effect matters more than fancy specs.

Where the Bluetooth 5.4 angle helps (and where it’s worth being realistic)

This model’s Bluetooth 5.4 compatibility is paired with claims about improved transmission reliability and anti-interference. The mention of LE 2M PHY coded support and an 80% improvement in anti-interference is certainly interesting.

That said, it’s still smart to be a bit cautious: Bluetooth performance can vary a lot depending on your phone, your environment, and even how you carry your device. So while the spec language points in a positive direction, real-world results will depend on conditions.

Another point to consider is the “Hall switch” feature. It’s described as a rarity in the market, and the practical benefit is immediate: after the first pairing, opening the case lid should connect automatically. If you hate manual reconnection, this is one of the few features here that directly targets a daily annoyance.

Call clarity with ENC and four microphones

The product description is quite clear on its intended use for calls. Four microphones plus ENC noise cancelling are described as separating your voice from background noise using algorithms. It also frames the advantage as most appreciated in environments where communication clarity matters.

If you’re working on calls outdoors, in busy households, or in open-plan offices, the “ENC + four mics” approach makes sense. It’s not a guarantee, but it’s a reasonable design choice for the type of earbuds people buy for meetings and messaging as much as for music.

You’ll still want to remember that wind and very loud surroundings can overwhelm almost any microphone setup—so it’s best thought of as improving clarity, not making you untouchable from noise.

Water resistance and comfort: IP7 and 3.7 g earbuds

Comfort is usually where bargain earbuds win or lose, and here the manufacturer gives a concrete figure: each earbud is said to weigh 3.7 g, aiming to keep them light during longer wear. The earbud design is also described as ergonomic and ultralight.

The other everyday win is IP7 waterproofing, with a nano-coating to help prevent water and sweat penetration. That makes these sound more suitable than basic “splash resistant” options if you plan to use them outdoors or during light exercise.

Still, do consider what you mean by “waterproof” in your use. IP ratings don’t always equal “safe for every situation”, so if you’re doing heavy rain running or swimming, you’ll want to double-check whether your expectations match the level of protection implied by IP7.

Tech summary (from the details provided)

• Bluetooth 5.4 support, including LE 2M PHY coded support and LE Audio LC3 codec compatibility
• ENC noise cancelling for calls
• 4 microphones
• Drivers: two 13 mm opening/“aperture” drivers (as described)
• Battery claims: up to 8 hours per charge and up to 40 hours with the case (total claimed playtime up to 48 hours)
• Charging: USB-C fast charge (stated “up to 1.5 hours” to reach full power, per provided info)
• Case: LED digital display for real-time energy status (as described)
• Comfort/weight: 3.7 g per earbud
• Water resistance: IP7 waterproof with nano-coating on the surface (as described)
• Pairing: one-step pairing described via an advanced Hall switch and automatic connection after initial pairing

When it makes sense to buy

It’s a sensible pick if you want Bluetooth earbuds with call-focused features (ENC and four microphones) and you don’t want to be charging constantly. The claimed 48-hour playtime and USB-C fast charging are practical for people who use earbuds throughout the week.

You’ll probably get the most out of this if you often move around with your phone nearby (where connection stability matters), and if you care about convenience pairing without extra taps.

When you might want to skip it

You may want to avoid these if you’re mainly chasing the best possible audio performance regardless of convenience features. This product is positioned more like a functional, everyday wireless earbud rather than something clearly aimed at audiophile-level playback.

Also, if your priorities are purely about connectivity with a very specific phone model or advanced app features, the information provided focuses on general Bluetooth support rather than device-specific tuning—so you’d need to check compatibility expectations carefully.

Is it worth it?

If you’re buying wireless earbuds for a mix of music, calls, and day-to-day portability, chalvh’s Bluetooth 5.4 earbuds look like they’re designed for exactly that: longer claimed battery life, ENC call noise cancelling, four microphones, and IP7 water resistance. The automatic pairing via Hall switch is a small thing, but it’s the kind of small thing you feel every time you put them back in.

Just don’t expect every spec claim to translate perfectly in every environment. If you’re often in extremely loud or windy conditions, or if you need absolute top-tier audio, you may find higher-end options align better with your standards.

Mini FAQ

Do these earbuds support automatic connection after the first pairing?

Yes—after the first pairing, the description says opening the charging case lid should connect the earbuds automatically via the Hall switch.

How long do they last on a single charge?

The manufacturer claims up to 8 hours of music on a single charge, with up to an additional 40 hours from the charging case.

Are they suitable for sweat or outdoor use?

They’re described as waterproof to IP7, with a nano-coating intended to help prevent water and sweat from penetrating the surface.

What’s the purpose of ENC here?

ENC is described as noise cancelling for calls, aimed at isolating your voice from background noise using algorithms.

How do you charge them?

Charging is via a USB-C fast charge, with a stated “up to 1.5 hours” to power up (based on the information provided).