If you want a secure, in-ear fit and the longest stated playback, choose CoolJumper Earbuds 120H; if you need an open-ear design for big ears, choose Monster Open Ear AC360. The key choice is whether you prefer an ear-hooked in-ear setup or a design that leaves the ear canal open.
For big ears, that distinction matters more than a small difference in Bluetooth version: these products sit on the ear in very different ways.
For big ears, that distinction matters more than a small difference in Bluetooth version: these products sit on the ear in very different ways.
CoolJumper Earbuds 120H vs Monster Open Ear AC360 at a Glance
• CoolJumper Earbuds 120H: An ear-hooked in-ear design, 13 mm drivers, and up to 120 hours of stated total playback with the charging case. Trade-off: the earbuds sit inside the ears.
• Monster Open Ear AC360: An open-ear fit, 16 mm drivers, Bluetooth 6.0, and up to 24 hours of stated playback with the charging case. Trade-off: it has no listed noise control.
• Choose CoolJumper if you want a sport-oriented hook, a stated 18 hours of continuous playback, and an in-ear listening style.
• Choose Monster if you want to avoid an in-ear fit and prefer an open design for workouts or outdoor activity.
• These are different kinds of earbuds, so fit and how you want to hear your surroundings should lead the decision.
CoolJumper’s defining feature is its combination of an in-ear earpiece and an ear hook. That gives it a more secured-wearing approach than a simple earbud shape, which may appeal if you want headphones that stay put during running or workouts. Its listed IP7 water resistance is also relevant for exercise, since the product is described as suitable for handling sweat. It is not an open-ear design, though: the earpieces sit inside the ears.
For listening, CoolJumper lists 13 mm dynamic drivers and a 20 Hz to 20,000 Hz frequency range, with a design intended to cover bass, midrange, and treble. The specs do not establish how the earbuds will sound to every listener, but they do make this the more explicitly in-ear, hi-fi-oriented option of the pair. CVC 8.0 noise cancellation is listed for calls, and the earbuds include a microphone and touch controls for answering and ending calls.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-19 · 8 min read · Independent comparison
Who should skip it: Skip CoolJumper if you specifically want open-ear headphones or dislike having an earpiece inside your ear.
Monster takes the opposite fit approach. The AC360 is listed as open-ear, so it does not use the in-ear placement specified for CoolJumper. That could be a better starting point if in-ear buds feel uncomfortable to you, or if you want an earphone design that leaves the ear canal open. The product is described as lightweight and intended to fit securely during exercise, but the sheet does not provide dimensions or a range of ear sizes, so there is no basis for promising a particular fit for every person with big ears.
Its 16 mm dynamic drivers are larger than CoolJumper’s listed 13 mm drivers, and the frequency range is also listed as 20 Hz to 20,000 Hz. Driver size alone does not determine sound quality, so I would not treat that number as a guarantee of fuller or better sound. Monster lists DNN 6th-generation noise filtering for calls, but its noise-control field says none. Those details point to a distinction: call filtering is specified, while general noise cancellation for listening is not.
The stated battery figures are up to 8 hours of use at a time and up to 24 hours with the charging dock. Bluetooth 6.0 is listed, along with touch controls, a 10-meter Bluetooth range, and IPX5 water resistance against rain and sweat. A rotating magnetic cover and included lanyard give the design some practical carry details, though the total playback figure is much shorter than CoolJumper’s stated 120 hours.
Who should skip it: Skip Monster if you want in-ear isolation or the longer total playback figure listed for CoolJumper.
• Best fit if you want an in-ear earbud with a hook → CoolJumper Earbuds 120H. Its ear-hook design is paired with an in-ear placement, making this the more secured, enclosed style.
• Best fit if you want an open-ear design → Monster Open Ear AC360. Its listed open-ear placement avoids the in-ear arrangement used by CoolJumper.
• Best for stated total playback → CoolJumper Earbuds 120H. The case-and-earbud figure is up to 120 hours, compared with Monster’s up to 24 hours with its charging dock.
• Best for longer single-session playback → CoolJumper Earbuds 120H. Its listed continuous playback is up to 18 hours, while Monster specifies up to 8 hours at a time.
• Best for a newer listed Bluetooth version → Monster Open Ear AC360. It specifies Bluetooth 6.0; CoolJumper lists Bluetooth 5.3. The version difference alone does not tell you how either will perform with your particular device.
• Best for a sport-oriented hook and stated IP7 protection → CoolJumper Earbuds 120H. Its sheet highlights an ear hook and IP7 water resistance for sweat.
• Best if you want an included lanyard → Monster Open Ear AC360. Its package lists one, alongside the charging case and cable.
• Best for the “best open ear headphones for big ears” search → Monster Open Ear AC360. It is the only open-ear model here, though the available specs cannot confirm how it will fit a particular ear.
Start with fit rather than a feature checklist. CoolJumper places an earpiece inside the ear and adds a hook; Monster uses an open-ear layout. If your priority is avoiding an in-ear fit, Monster is the straightforward match. If you want an ear-hooked design that is described as staying secure during exercise, CoolJumper is more aligned with that preference. Neither product’s listed information gives specific measurements or a fit range for big ears, so I would avoid treating either as a guaranteed fit based on that phrase alone.
Think about what “noise control” means to you, too. CoolJumper lists CVC 8.0 noise cancellation and connects it to clearer calls in noisy surroundings. Monster lists DNN noise filtering for calls, but its general noise-control field is “none.” Neither description provides a measured noise-reduction result, so these details are best read as call-related features, not proof that one will block surrounding sound while you listen.
Battery figures need context. CoolJumper’s 120-hour number includes the case, while its stated continuous playback is 18 hours. Monster lists up to 24 hours with the dock and up to 8 hours at a time. If you care about long stretches between charging, those single-session figures may matter more than the larger combined total. If you often travel or exercise in short sessions, the case totals may be the more useful comparison.
Water-resistance labels also differ: CoolJumper lists IP7, while Monster lists IPX5. The product descriptions associate each with sweat and exercise use, and Monster also mentions rain. These ratings are not identical, so I would not treat them as interchangeable or assume either device is suitable for every water-related situation. For sound, the driver sizes—13 mm for CoolJumper and 16 mm for Monster—are useful identifying specs, but they do not settle which will sound better to you.
For big ears, I would choose Monster Open Ear AC360 if avoiding an in-ear fit is the main goal. Its open-ear design is the clearer match, although the listed specs cannot guarantee a fit for every ear shape.
If I wanted an ear hook, a stated 18 hours of continuous playback, and much longer total playback with the case, I would choose CoolJumper instead. My pick comes down to fit first, then battery needs.
Monster is the open-ear option, while CoolJumper uses an in-ear earpiece with an ear hook. The available specifications do not give dimensions or confirm fit for particular ear sizes, so the design difference is more useful than a promise of fit.
Which has longer battery life?
Its listed noise-control field says none, although the product information describes DNN filtering for calls. That is not the same as a stated general listening noise-cancellation feature.
Both products are described for exercise use, but their listed water-resistance ratings differ: IP7 for CoolJumper and IPX5 for Monster. Check the product’s stated limits for your intended conditions rather than assuming the ratings mean the same thing.
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