If you want open-ear comfort and 30 hours of total playback for study, choose Monster Open Ear AC510; if you need a compact in-ear fit, single-ear listening, and clearer call-focused features, choose OYIB Earbuds.
If you want open-ear comfort and 30 hours of total playback for study, choose Monster Open Ear AC510; if you need a compact in-ear fit, single-ear listening, and call-focused features, choose OYIB Earbuds.
For most desk-based study sessions, I’d lean toward Monster: its open-ear design and longer stated case-inclusive playback suit extended listening without committing to an in-ear fit. OYIB makes more sense if you prefer conventional earbuds or expect to switch between listening and calls.
Monster Open Ear AC510 vs OYIB Earbuds at a Glance
• Monster Open Ear AC510: Open-ear placement, touch controls, AI noise-reduction features, and up to 30 hours of playback with the case. Trade-off: its open-ear design is not the same as an in-ear seal for keeping outside sound at bay.
• OYIB Earbuds: In-ear fit, single-ear or two-ear use, four microphones, and ENC call-noise reduction. Trade-off: up to 25 hours with the case, and five hours from one charge.
• For study: Choose Monster if open-ear listening and longer total playback matter most; choose OYIB if you favor an in-ear fit and flexible one-ear use.
• For calls between study sessions: OYIB’s four microphones and ENC are its clearest stated advantage.
• For a quick, phone-free adjustment: Both offer touch control for tasks such as changing tracks and adjusting volume.
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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Monster’s defining choice is its open-ear placement. That may appeal to someone who wants audio without choosing an in-ear design, especially for a study routine that includes moving around the room or staying more aware of the surroundings. The earbuds use a 13 mm dynamic driver, and Monster describes its sound as intended to deliver a broad, detailed listening experience. Those claims are product descriptions, not a guarantee that every listener will prefer its sound.
Touch controls handle common actions, including calls, track changes, and volume adjustment. The listed Bluetooth version is 6.0, and the stated total playback time is up to 30 hours when the charging case is included. IPX6 water resistance is another practical feature if your earbuds also go along to workouts or walks. The case has a sliding cover.
I’d consider Monster for long study blocks, casual listening, and someone who specifically wants open-ear earbuds. I’d skip it if you want a snug in-ear design or are choosing primarily for one-ear listening: OYIB explicitly supports switching between single- and double-ear modes. Monster lists AI noise reduction, but its open-ear placement remains an important design distinction if you’re looking for a more enclosed listening experience.
OYIB takes the conventional in-ear route, with a semi-in-ear acoustic structure and a lightweight design described as 4 g per earbud. Its Bluetooth 5.3 connection supports automatic reconnection after the first pairing when the case is opened. For someone who likes putting one earbud in and leaving the other out, OYIB explicitly supports single-ear mode and lets you switch to using both.
The call features are a strong part of its case. Each earbud has two microphones, for four in total, and ENC is intended to reduce background noise during calls. Its touch controls can manage music, volume, calls, and voice-assistant access. The stated playback is five hours per charge, with up to 25 hours total using the case; the case is listed as charging fully in an hour via USB-C. OYIB also lists IP7 water resistance.
I’d choose OYIB if you want an in-ear option that can pull double duty for calls, commuting, and study. Its listed call-noise reduction and single-ear mode make it especially adaptable between tasks. I’d look elsewhere if your main priority is the longest stated total playback between these two, or if you specifically want open-ear placement.
• Best for longer total playback → Monster Open Ear AC510. It lists up to 30 hours with the case, compared with OYIB’s up to 25 hours.
• Best for single-ear listening → OYIB Earbuds. The product specifically supports single-ear mode and switching to two-ear use.
• Best if you prefer open-ear placement → Monster Open Ear AC510. OYIB is the in-ear choice.
• Best for calls → OYIB Earbuds. Its four microphones and ENC call-noise reduction put more emphasis on voice pickup and calls.
• Best for a shorter stated full charge → OYIB Earbuds. The case is listed as charging fully in an hour; Monster lists two hours.
• Best for study sessions with frequent movement → Monster Open Ear AC510. Its open-ear design may suit a routine where you’d rather not use an in-ear style. Neither product’s features guarantee that outside noise will be inaudible.
• Best for rain or sweaty workouts → OYIB Earbuds, on the listed water-resistance rating. OYIB specifies IP7, while Monster specifies IPX6. These ratings are not a promise that either product is suitable for every water exposure.
• Best for switching between study audio and calls on one ear → OYIB Earbuds. Its single- and double-mode design addresses that use directly.
If you’re comparing the best true wireless earbuds for study, the key question here is less about touch controls—both have them—and more about fit and routine. Monster favors open-ear listening and longer total playback. OYIB favors in-ear use and call flexibility.
Neither is specifically described as a sleep headphone, so I wouldn’t choose either on that basis alone. And while OYIB’s listed age range includes teens, that doesn’t make it a dedicated kids headset for study; a child’s fit and listening habits still matter.
I’d buy the Monster Open Ear AC510 for study because I prefer its open-ear design for longer listening sessions, and its stated 30-hour case-inclusive playback edges out OYIB’s 25 hours.
That recommendation is about those specific priorities, not a claim that Monster blocks outside sound or suits every ear.
If calls and single-ear listening matter more to you, I’d pick OYIB instead.
For my study routine, though, Monster is the more fitting choice.
Monster is the closer fit if you want open-ear placement and longer total playback with the case. OYIB is a better match if you prefer in-ear earbuds, use one earbud at a time, or place more importance on call features.
Monster lists AI noise-reduction features, but the earbuds have open-ear placement. OYIB lists ENC specifically for calls; that is not the same as a promise that study-room noise will disappear.
Monster lists up to 30 hours of playback including its case. OYIB lists up to 25 hours with the case and five hours from a single charge.
OYIB has two microphones in each earbud and ENC call-noise reduction. Those features are aimed at clearer calls, though actual call quality can depend on the surroundings and connection.
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