We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-04 · 7 min read · Independent comparison
If you want an open-ear, sweat-and-rain-proof headset for calls while you run, ride or work out, choose MASTJUST Waterproof Bone Conduction; if you need true wireless earbuds with active noise cancelling, multipoint pairing and app-based control for calls on the move, choose JLab JBuds ANC 3.
• MASTJUST Waterproof Bone Conduction — biggest strength: an IP67-rated open-ear bone conduction design with dual CVC8.0 noise-cancelling mics, so your ears stay open to traffic and your voice stays clear on calls.
• MASTJUST Waterproof Bone Conduction — biggest trade-off: it is not built for swimming, and it is a single-device Bluetooth 5.2 headset rather than a multipoint one.
• JLab JBuds ANC 3 — biggest strength: Bluetooth multipoint pairing for two devices at once, smart ANC with three noise-control modes, and 42+ hours of total playtime from the case.
• JLab JBuds ANC 3 — biggest trade-off: the in-ear fit seals your ears off from your surroundings, and ANC mode drops total playtime to 34+ hours.
• Pick MASTJUST if you want one headset that stays on your head through hard outdoor training and keeps your ears aware of what's around you.
• Pick JLab JBuds ANC 3 if you want small earbuds that jump between your laptop and your phone without re-pairing and shut out the noise around you.
The MASTJUST headset does one thing differently from almost everything else in this comparison: it doesn't go in your ears at all. It's a bone conduction design, which means the driver vibrates against your temporal bone and sends sound straight to your inner ear. In my opinion that's the whole point of this product. Your ear canal stays open, so you can hear a car coming up behind you on a ride or a colleague calling your name in the gym. For anyone who has ever felt uneasy wearing sealed earbuds while running near traffic, that design choice alone is the reason to look at it.
The spec sheet backs up the outdoor-first intent. IP67 waterproofing covers sweat, rain, fitness, hiking and riding — with the manufacturer's own caveat that it isn't meant for swimming. The body weighs just under 25 grams and uses a flexible titanium headband with soft silicone, which is the kind of build that's meant to sit on your head for a whole session without clamping down. Bluetooth 5.2 gives you a 10-metre (33-foot) range. Battery is rated at 8 hours of use per full charge, 6–10 hours of working time, and a 10-minute top-up is quoted as good for an hour of talk time. Charging is over USB-C and takes about 2 hours.
The call side is where this headset earns its place in a "best headset for calls" shortlist. It carries dual CVC8.0 noise-cancelling microphones plus ENC noise reduction, which is the combination that picks up your voice and pushes down background noise. For outdoor calls — a quick check-in mid-run, a hands-free call on a bike path — that's the sensible setup. Audio is driven by an 8-ohm bone conduction driver with a 20 Hz–20 kHz frequency range, and controls run through the app.
Who should skip it? Anyone who wants to disappear into their music on a plane or a noisy train. Open-ear means open-ear. If you want silence around you, this isn't the product. And if you regularly juggle a laptop and a phone at the same time, note that multipoint pairing isn't part of this headset's feature set — you connect it to one device at a time.
The JBuds ANC 3 is the opposite philosophy: small true-wireless earbuds that seal your ears and then actively remove the world around you. Smart ANC adjusts to your environment and learns how to cancel noise, and you get three modes — ANC On, Be Aware and ANC Off. Be Aware passes outside sound through, so you're not completely cut off when you need to hear something. That's a genuinely useful middle ground, and it's the mode I'd live in on a commute.
The headline feature for this comparison is multipoint. The earbuds hold a Bluetooth connection to two devices at once, so you can be listening to a podcast on your computer and take a call on your phone without re-pairing anything. Google Fast Pair handles Android setup in seconds, and Find My is included for when they inevitably go missing between the couch cushions. Bluetooth 5.2, HSP/HFP/A2DP/AVRCP profiles, and a 10-metre range round out the connectivity picture.
Battery is the other strong card. Each earbud is rated at 9+ hours, with 33+ more in the charging case for 42+ total hours. Switch ANC on and you're looking at 34+ total hours. There's no fast-charge figure listed, so on longer trips you'll want to plan ahead rather than count on a quick top-up. The case charges in about 2 hours. The earbuds are IP55 sweat- and dustproof, which covers workouts and commutes but is a step below the MASTJUST rating. Either earbud can be used independently when you want one ear free, and the lightweight build is meant to stay put through long wear sessions.
For calls specifically, there are MEMS microphones in each bud, and you can shape the sound with three EQ3 presets — JLab Signature, Balance or Bass Boost. A 10 mm dynamic driver covers 20 Hz–20 kHz. The JLab app lets you manage ANC modes, remap touch controls, adjust EQ and set safe hearing limits, plus it delivers firmware updates. There's also a 2-year JLab warranty. Who should skip it? If you can't wear anything inside your ear canal, or you need to hear traffic while you run, the sealed in-ear design works against you here.
• Best for staying aware outdoors → MASTJUST Waterproof Bone Conduction. The open-ear design keeps your surroundings audible while you train.
• Best for multipoint pairing → JLab JBuds ANC 3. Two devices connected at once, no re-pairing when you move from laptop to phone.
• Best for noise blocking → JLab JBuds ANC 3. Smart ANC with ANC On, Be Aware and ANC Off modes.
• Best for water and sweat resistance → MASTJUST Waterproof Bone Conduction. IP67 versus IP55.
• Best for total battery life → JLab JBuds ANC 3. 42+ hours with the case, 34+ with ANC on.
• Best for fast top-ups mid-session → MASTJUST Waterproof Bone Conduction. A 10-minute charge is quoted as an hour of talk time.
• Best for call clarity in wind and street noise → MASTJUST Waterproof Bone Conduction. Dual CVC8.0 mics plus ENC noise reduction.
• Best for app-based customization → JLab JBuds ANC 3. EQ presets, touch remapping and hearing limits in the JLab app.
For calls, my pick is the MASTJUST Waterproof Bone Conduction headset. The combination of dual CVC8.0 noise-cancelling mics, ENC noise reduction, IP67 protection and an open-ear fit makes it the more sensible companion for talking while running, riding or working out — especially if you'd rather hear the world than block it out. I'd choose the JLab JBuds ANC 3 instead if multipoint pairing matters more to you than staying aware: being connected to your laptop and phone at the same time, with ANC to quiet the room, is a genuinely different and very useful kind of convenience. Check the current price on Amazon before you commit — both are worth weighing against what you'll actually use them for.
how to pair multiple headphones
You can't pair one phone's audio to two headsets at the same time through standard Bluetooth; each device connects to one audio output at a time. What you can do is pair several headsets to the same phone and switch the active one in your Bluetooth settings. For two devices at once on one headset, you need multipoint — which the JLab JBuds ANC 3 supports, holding a connection to two devices simultaneously.
how to pair multiple headphones iphone
On iPhone, open Settings, go to Bluetooth, and pair each headset one at a time — they'll all appear in your device list. iPhone doesn't output audio to two headsets simultaneously, so you switch between them from that list. If you want a single headset that stays connected to two sources, look for multipoint support like the JBuds ANC 3 offers; the MASTJUST headset connects to one device at a time.
how to pair multiple headphones on ipad
The process on iPad mirrors the iPhone: Settings, then Bluetooth, then pair each headset individually. All paired headsets stay listed, and you tap the one you want to use. The catch is the same — iPad plays audio through one output at a time. Multipoint earbuds such as the JLab JBuds ANC 3 let you stay linked to two devices, so you can hop between an iPad and a phone without re-pairing.
how to pair multiple bluetooth headphones
Pair each headset to your source one at a time, and remember that Bluetooth audio only routes to one device at once. For juggling two sources on a single pair of earbuds, multipoint is the feature that matters — the JBuds ANC 3 connects to two devices simultaneously, so a call on your phone can interrupt audio from your laptop. The MASTJUST bone conduction headset is a single-connection design, so you'd re-pair when switching sources.
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