We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-27 · 6 min read · Independent comparison
If you want the simplest, most reliable way to control your music with a physical remote and don't mind a cable, choose Koss BT115i; if you need true wireless freedom, tap-based touch controls, and a genuinely waterproof rating for hard workouts, choose USBERG Sport Earbuds IPX7.
• Koss BT115i — biggest strength: An in-line mic and remote give you tactile, no-look control over volume, play/pause, track skip and calls, plus a cable clip that keeps the whole thing tangle-free.
• Koss BT115i — biggest trade-off: It's a wired Bluetooth design with an older Bluetooth 4.2 connection, a stated 6-hour battery life, and no water-resistance rating beyond "sweat resistant."
• USBERG Sport Earbuds IPX7 — biggest strength: A true-wireless fit with ear hooks, IPX7 sweat/water protection, Bluetooth 5.3, and up to 40 hours total playtime with the charging case.
• USBERG Sport Earbuds IPX7 — biggest trade-off: Controls are touch-based, so they can be less precise than a real button, and only the earbuds are water-resistant — the case is not.
• Pick Koss BT115i if you want dependable physical controls and a fit that stays put on a cable.
• Pick USBERG Sport Earbuds IPX7 if you want cable-free listening, longer runtime, and stronger water protection for sweaty sessions.
The BT115i is a classic neckband-style Bluetooth earbud. A single cable links the two buds, and that cable carries an in-line remote and microphone. That's the whole appeal: you get physical controls for volume, play/pause, track skip and answering or ending calls, so you can reach down and adjust without staring at your phone. The cable management clip slides along the cord so it stays tidy instead of bouncing around.
Koss built this around movement. It's sweat resistant, uses an angled ergonomic shape, and ships with three pairs of silicone tips (small, medium and large) so you can dial in the seal. The dynamic driver is rated 18–20,000 Hz with 16-ohm impedance, and Bluetooth range is listed at about 10 meters. It supports Bluetooth 4.2 and uses USB-C charging.
Buy it if you want simple, tactile control and a fit that hangs securely from your ears rather than sitting loose in them. Skip it if you want true-wireless convenience or need real water protection — "sweat resistant" is not the same as waterproof, so heavy rain or a soaked gym session is outside its design brief. Also note the stated battery life is on the shorter side, and charging takes a while, so it suits shorter runs and commutes more than all-day wear.
The USBERG Sport Earbuds are fully wireless, with flexible ear hooks that wrap behind each ear to lock the bud in place. They come with S/M/L silicone tips and are marketed around all-day comfort — the kind of fit that's meant to survive sprints, cycling and long commutes without shifting. Each earbud houses a 10mm dynamic driver, which is a notably large driver for this category and typically points to fuller low-end and more layered sound.
The standout spec is the IPX7 rating. IPX7 means the earbuds can handle heavy sweat and getting caught in light rain, which is exactly what a gym or outdoor workout throws at them. One thing to keep in mind: the charging case is not waterproof, so it needs to stay dry. For controls, everything is touch-based — tap gestures for volume, track changes, calls and voice assistant — and you can toggle between three EQ modes (balanced, bass-heavy, vocal-focused) to suit music, podcasts or audiobooks.
Battery is the other headline: 8 hours per charge, plus about four extra full recharges from the case for up to 40 hours total, with a 1.5-hour charge time. Bluetooth 5.3 covers the connection, and a built-in mic handles calls. Buy it if you want cable-free freedom, serious water protection and long runtime. Skip it if you prefer physical buttons you can feel, since touch controls reward a bit of learning and can misfire with a gloved or sweaty finger.
• Best for water protection → USBERG Sport Earbuds IPX7. IPX7 is a real immersion-grade rating; Koss only lists "sweat resistant."
• Best for total playtime → USBERG Sport Earbuds IPX7. Up to 40 hours with the case versus a stated 6 hours on the Koss.
• Best for control feel → Koss BT115i. The in-line remote gives you physical buttons and a mic you can operate by touch.
• Best for true-wireless freedom → USBERG Sport Earbuds IPX7. No cable at all, with ear hooks that hold the fit.
• Best for fit security on a budget of features → both work, differently. Koss relies on an angled shape and cable clip; USBERG relies on ear hooks.
• Best for sound tuning → USBERG Sport Earbuds IPX7. Three switchable EQ modes and a 10mm driver give you more ways to shape audio.
• Best for newer connectivity → USBERG Sport Earbuds IPX7. Bluetooth 5.3 versus Bluetooth 4.2 on the Koss.
• Best for anyone who hates touch controls → Koss BT115i. If tap gestures frustrate you, the wired remote is the safer bet.
In my opinion, the USBERG Sport Earbuds IPX7 win for most active buyers. The combination of true-wireless freedom, IPX7 protection, Bluetooth 5.3 and up to 40 hours of total playtime is simply more capable for running, cycling and gym work. I'd choose the Koss BT115i only if physical in-line controls matter more to you than water protection and long battery life — that tactile remote is genuinely easier to use mid-workout. If you're weighing the cost, check the current price on Amazon before deciding, since value shifts depending on which fit and features you actually need.
FAQ
Touch control means the earbuds use tap or swipe gestures on their surface instead of physical buttons — for example, tapping to play/pause or adjust volume. The USBERG Sport Earbuds IPX7 use this approach for volume, track switching, calls and voice assistant.
Most touch-control earbuds let you turn gestures off through a companion app or a specific tap-and-hold sequence. If no such option exists, the practical workaround is to manage playback from your phone instead and treat the buds as output only.
Wireless earbuds send control signals over Bluetooth, so a tap or press can trigger play, pause or call actions on your phone. The USBERG's touch controls and the Koss BT115i's in-line remote both send these commands by design.
Not strictly, but it helps. The USBERG Sport Earbuds IPX7 handle heavy sweat and light rain, while the Koss BT115i is only rated sweat resistant — fine for normal workouts, but not for getting soaked.
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