We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-19 · 6 min read · Independent comparison
If you want a single travel kit that also charges your phone and keeps going for days between charges, choose Groove 4-in-1; if you need open-ear sports headphones with the newest Bluetooth and true sweat-and-rain protection, choose ACEFAST AceFit Air Open. Two very different products that happen to compete for the same buyer's attention.
• Groove 4-in-1 biggest strength: 80 hours of total playtime plus a bundled 25W dual-port quick charger and wireless phone charging pad — it's a whole travel kit, not just earbuds.
• Groove 4-in-1 biggest trade-off: Ear-hook, over-ear fit with a hard plastic/rubber travel case — bulkier to pocket, and the "noise cancelling" spec sits alongside a 13-hour average battery rating per charge.
• ACEFAST AceFit Air Open biggest strength: Open-ear design with Bluetooth 5.4 and IP66 waterproofing — nothing plugs your ear canal, so you stay aware of traffic and surroundings while you run.
• ACEFAST AceFit Air Open biggest trade-off: No noise cancellation at all, and the listed average battery life is 25 hours with an 8-hour charge time — slower to top up than you'd expect.
• Who Groove 4-in-1 is for: Frequent travelers and commuters who want one bag item that handles music, calls, and phone charging.
• Who ACEFAST AceFit Air Open is for: Runners, cyclists, and outdoor athletes who prioritize awareness, sweat resistance, and modern Bluetooth over total isolation.
The Groove 4-in-1 is less a pair of earbuds and more a small electronics kit. You get the earbuds themselves, a hard plastic or rubber travel case, a 25W dual-port quick charge adapter, and a wireless phone charging pad — all in one box. In my opinion, that's the real story here. If you've ever packed for a trip and realized you forgot your wall charger, this is the product that quietly solves that. The spec sheet lists it as a "4-in-1" for exactly this reason.
On the audio side, it's a dynamic driver running a 20 Hz–20,000 Hz frequency range with 140-ohm impedance, Bluetooth 5.3, and a stated wireless range of about 15 meters. The headline number is 80 hours of playtime — that's the figure Groove leads with, and it's the kind of number that makes a week of commutes feel like nothing. Note that the battery spec also lists a 13-hour average life, which suggests the 80 hours is a cumulative/case figure rather than a single-charge figure. Either way, it's a long-legged kit. Active noise cancellation is on board, controlled by touch, and an LED indicator keeps you informed of status. IPX7 waterproofing means a downpour or a sweaty gym session shouldn't be a problem.
Who should buy it: travelers, commuters, students, and anyone who wants one purchase to cover headphones and charging. Who should skip it: if you want an open-ear fit so you can hear traffic while cycling, or you hate ear-hook designs, this isn't the one. The over-ear, ear-hook shape is secure but noticeable, and the kit is bulkier to carry than a slim case of earbuds.
The ACEFAST AceFit Air Open is built around a different idea: don't seal the ear. Open-ear headphones sit outside the ear canal, which means you hear your music and your environment. For runners, cyclists, and anyone working out near roads or on trails, that awareness is the whole point. The earpiece shape is listed simply as "open ear," and the color is all black.
The connectivity story is the newest here — Bluetooth 5.4, which is a step ahead of the 5.3 in the Groove kit. Audio runs through a dynamic driver with 38-ohm impedance, and ACEFAST markets rich bass and crisp audio as the core experience. There's no active noise cancellation on this model; the noise control field is simply "None." That's not a flaw for the intended buyer — it's the design philosophy. You want to hear what's around you.
Battery is rated at 25 hours average life with the charging case, and the charge time is listed at 8 hours. IP66 waterproofing covers sweat and light rain, which lines up with the running, cycling, walking, and workout use cases ACEFAST names. A two-year manufacturer warranty is included, and it ships with a charging station. Touch controls handle playback.
Who should buy it: outdoor athletes and anyone who finds in-ear or over-ear buds uncomfortable or isolating. Who should skip it: if you fly a lot and want to block out engine noise, or you want a charging pad and adapter in the box, this isn't that product. Open-ear means leakage in both directions — you hear the world, and the world may hear a little of you at high volume.
• Best for battery life → Groove 4-in-1. 80 hours stated playtime versus 25 hours average on the ACEFAST. If charging anxiety is your enemy, Groove wins.
• Best for outdoor awareness → ACEFAST AceFit Air Open. Open-ear means no ear canal blockage — the safer choice for running and cycling near traffic.
• Best for travel kit value → Groove 4-in-1. It bundles a 25W dual-port quick charger, a wireless phone charging pad, and a protective case in one package. That's a lot of functionality in a single buy.
• Best Bluetooth version → ACEFAST AceFit Air Open. Bluetooth 5.4 edges out the Groove's 5.3.
• Best water protection → ACEFAST AceFit Air Open on paper (IP66), but Groove's IPX7 is rated for immersion. IPX7 is a stronger water rating than IP66 for full submersion; IP66 is stronger against dust. Pick based on whether you're swimming-adjacent or dusty-trail-adjacent.
• Best for noise blocking → Groove 4-in-1. It has active noise cancellation; the ACEFAST has none by design.
• Best for charging speed → Groove 4-in-1. ACEFAST lists an 8-hour charge time, which is slow. Groove's quick-charge adapter is built for getting you moving faster.
• Best for all-day comfort in one spot → depends on your ears, but open-ear designs like the ACEFAST are often preferred by people who dislike ear-hook pressure. The Groove uses an ear-hook, over-ear placement, which some find less comfortable over long sessions.
I'd buy the Groove 4-in-1. In my opinion, it does more for the money in real life: it charges your phone, it charges itself, and it keeps playing long past when most earbuds quit. The ACEFAST AceFit Air Open is the better pick if you're an outdoor athlete who needs to hear traffic — but for most people reading this, the Groove kit's versatility wins. If open-ear awareness is non-negotiable for you, go ACEFAST without hesitation. Otherwise, Groove.
Both can handle a workout, but they solve it differently. The ACEFAST is open-ear with IP66 sweat and rain protection, so you stay aware of your surroundings. The Groove is IPX7 (immersion-rated) with an ear-hook fit, which is secure but blocks your ears. For road running, I'd lean ACEFAST.
No. The spec sheet lists noise control as "None." That's intentional — open-ear headphones are designed to let ambient sound in. If you need active noise cancellation, the Groove 4-in-1 has it.
Groove states 80 hours of playtime, with a 13-hour average battery life figure also listed. ACEFAST states 25 hours average life with the charging case. Treat the larger numbers as the total with the case factored in.
Check the current price on Amazon before deciding — the site has a button for that. On specs alone, the Groove 4-in-1 bundles a charger, charging pad, and case, which is a lot of hardware in one purchase. The ACEFAST counters with Bluetooth 5.4 and a two-year manufacturer warranty. Value depends on whether you want a kit or a pure sports headphone.
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