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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-27 · 7 min read · Independent comparison
• iJoy Over-Ear — biggest strength: a true over-ear design with touch volume controls, passive noise cancellation, a 3.5 mm jack and an SD slot, so it works even when the battery is flat.
• iJoy Over-Ear — biggest trade-off: 10 hours of playtime and a 2-hour charge means it is a one-day-at-a-time device, and the plastic build is functional rather than premium.
• sajawass Earbuds Headphones — biggest strength: 75 hours of total playtime with the charging case, IPX7 water protection and Bluetooth 5.4, which is a lot of convenience in a tiny package.
• sajawass Earbuds Headphones — biggest trade-off: it is an in-ear design with no headphone jack at all, so if the battery dies there is no wired fallback.
• Who each pick is for: iJoy for desk workers, students and commuters who want one comfortable over-ear pair with a wired lifeline; sajawass for runners, gym-goers and anyone who wants earbuds that survive sweat and rarely need charging.
The iJoy Ultra is built around a simple idea: one pair of headphones that covers work, school, gym and casual listening without asking much of you. It's an over-ear model with rounded earpieces and a plastic enclosure in silver, weighing about 8 ounces. That's a real over-ear fit — the kind that sits around your ears rather than inside them, which is what most people reach for when they plan to wear headphones for hours at a desk.
What stands out to me is the redundancy. It runs Bluetooth 5.0 with a 10-metre range, but it also has a 3.5 mm jack and ships with an AUX cable, so you're never fully dependent on the battery. There's an SD slot too, which is unusual at this level and genuinely useful if you like carrying music on a card instead of streaming it. The audio side is a dynamic driver covering 20 Hz to 20,000 Hz at 32 ohm impedance — a standard, easy-to-drive spec that most phones and laptops will handle without a headset amp.
Controls are touch-based, including volume, and noise control is passive rather than active. That means the over-ear cups physically block some surrounding sound, but there's no powered noise cancelling circuit doing the work. For an office or a lecture hall, that's usually enough. On a plane, it won't match a dedicated ANC model — and the sheet doesn't claim otherwise.
So who should buy it? I'd point to students, remote workers, and commuters who want one pair of over-ear headphones for everything, and who value the wired fallback and SD slot enough to accept a single-day battery. Who should skip it? Anyone who wants multi-day battery, active noise cancellation, or a sweat-proof rating for hard training — the sheet lists none of those.
sajawass Earbuds Headphones: Who It's For
The sajawass earbuds go the other direction entirely. These are in-ear sports earbuds in red, built from thermoplastic elastomer with ultra-light ear hooks, and the whole pitch is "stay in place and keep going." The TPE hooks are the part that matters here — that's the material used for flexible, skin-friendly grips, and combined with three tip sizes it's designed to give you a snug seal rather than a loose, falling-out fit.
The battery story is the headline. You get over 8 hours from a single charge and up to 75 hours total with the charging case, which charges in about 1.5 hours over USB-C. There's an LED digital display that shows battery levels for both the buds and the case, so you're not guessing. In practice, that's the kind of setup where you charge once and then forget about it for a week or more of normal use.
On sound, the sheet describes a 13 mm dynamic driver delivering strong bass, a mellow midrange and clear treble. A 13 mm driver is large for an earbud, and larger drivers generally move more air, which is why bass tends to feel fuller. There's also ENC noise reduction with a built-in mic — ENC is about isolating your voice from background noise on calls, which is different from blocking noise for you. Worth knowing the distinction if call clarity is your priority.
Connectivity is Bluetooth 5.4 with a 10-metre range, and the sheet highlights faster transmission and more stable connections without dropouts. IPX7 waterproofing covers sweat and rain. Touch controls handle play/pause, calls, volume, track skipping and voice assistant, and it works with most Bluetooth phones and tablets.
Side-by-Side: Which Should You Choose?
• Best for all-day desk and study sessions → iJoy Over-Ear. Over-ear cups, touch volume control and a 10-hour battery cover a normal working day.
• Best for workouts and sweaty training → sajawass Earbuds Headphones. IPX7 protection and TPE ear hooks are designed for exactly that.
• Best for battery life → sajawass Earbuds Headphones. 75 hours total with the case versus 10 hours on the iJoy.
• Best for charging speed → sajawass Earbuds Headphones. 1.5 hours to full, against 2 hours for the iJoy.
• Best for a wired fallback → iJoy Over-Ear. The 3.5 mm jack and included AUX cable mean it still works with a dead battery; the sajawass has no jack.
• Best for newer Bluetooth → sajawass Earbuds Headphones. Bluetooth 5.4 versus Bluetooth 5.0 on the iJoy.
• Best for carrying your own music → iJoy Over-Ear. The SD slot is a feature the sajawass simply doesn't have.
• Best for home or office use with glasses and long hair → iJoy Over-Ear. An over-ear fit avoids the in-ear pressure and seal issues some people get with buds.
• Best for commute and travel flexibility → iJoy Over-Ear, in my opinion. Wireless when you want it, wired when you need it, and passive isolation from the cups.
If I were buying for myself and my priority were long, comfortable sessions at a desk with zero risk of being stranded by a dead battery, I'd take the iJoy Over-Ear. The wired backup, SD slot and over-ear fit are the features I'd actually use every day, and 10 hours is enough for how I work. If my priority were training, sweat and not thinking about a charger for a week, I'd take the sajawass Earbuds Headphones without hesitation — 75 hours, IPX7 and ear hooks are the right tool for that job. Two different jobs, two different answers. Check the current price on Amazon before you decide, since that's the one number that can tip a close call.
Both have a microphone. The iJoy's over-ear cups give you passive noise isolation and a boom-free touch control setup, while the sajawass uses ENC to separate your voice from background sound. For a quiet office, the iJoy's fit is more comfortable over long calls; for calls taken outdoors or in noisy gyms, the sajawass ENC approach makes more sense.
Read that number carefully: it's 8-plus hours from a single charge and up to 75 hours total using the charging case. So yes, if you count case recharges. For a single continuous session, expect around 8 hours, which still beats most people's workout or workday.
Yes. It has a 3.5 mm headphone jack and comes with an AUX cable, plus an SD slot for card-based playback. That's the main practical difference between these two — the sajawass earbuds have no jack, so they're Bluetooth-only.
The sheets tell different stories. The sajawass carries an IPX7 waterproof rating, which specifically covers sweat and getting wet, and it's built from thermoplastic elastomer. The iJoy is a plastic over-ear with a 365-day manufacturer warranty versus 90 for the sajawass. In my opinion, the sajawass wins on moisture resistance and the iJoy wins on warranty length.
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