If you want a neckband with longer stated battery life and flexible charging for office days, choose Hmusic A3; if you need compact semi-in-ear earbuds with IPX4 water resistance, choose Defunc True LITE II. For office use, I’d choose the A3 when long sessions and switching between devices matter most; Defunc makes more sense when a small, case-based earbud setup is the priority.
• Hmusic A3 strength: 35 hours of stated battery life, dual-device connection, and USB-C or wireless OTG charging; trade-off: its neckband design is less compact than separate earbuds in a charging case.
• Defunc True LITE II strength: compact semi-in-ear earbuds with Bluetooth 6.0, touch controls, and IPX4 water resistance; trade-off: its stated total playtime is 20 hours, shorter than the A3’s.
• Hmusic A3 is for: people who want a neckband for extended work sessions, calls, and device switching.
• Defunc True LITE II is for: people who prefer small earbuds and a charging case for everyday listening and commuting.
The A3 is built around a flexible neckband, with earbuds that attach magnetically when not in use. That layout makes sense for an office routine that includes taking calls, pausing audio to talk with someone nearby, and returning to listening without putting the earbuds away each time. Its listed weight is 33 grams, and it includes three sizes of ear tips.
Battery life is the A3’s clearest advantage on paper: the product information states up to 35 hours, with a 1.5-hour charge time. It supports USB-C cable charging as well as wireless OTG charging with compatible phones, laptops, or tablets. That gives it more charging options than a model that depends on a case, though the OTG feature may matter only if you have a device that can provide that kind of charge.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-19 · 6 min read · Independent comparison
For office buyers, the useful extras are practical rather than flashy. The A3 supports connections to two devices at once, has an ENC microphone for calls, and offers three EQ modes: Bass, Vocal, and Equilibrium. It also has a 45 ms low-latency game mode. I’d skip it if you want the smallest possible earbuds or favor a semi-in-ear fit; the A3 is specifically a neckband with in-ear tips.
Defunc takes the more compact route. The True LITE II uses semi-in-ear earbuds and a charging case, with touch controls and Bluetooth 6.0. Its 13 mm dynamic driver is larger by stated diameter than the A3’s 12 mm driver, but driver size alone doesn’t tell you which will sound better. The Defunc listing describes the sound as having bass, clear vocals, and balanced stereo; those are product claims, not a substitute for choosing by fit and features.
This model’s strongest case is portability and simple daily use. Separate earbuds and a case are easier to carry than a neckband if you prefer a small listening setup, and IPX4 water resistance is a useful detail for ordinary exposure to splashes. Defunc also lists ENC clear calls, low-latency performance, and AI app compatibility. The supplied information doesn’t detail what the app does, so I wouldn’t buy it for a specific app feature without checking that separately.
The stated total playtime is up to 20 hours, which is less than the A3’s 35 hours. That may be enough for a routine built around shorter listening periods and charging the case between uses, but the listing doesn’t provide a separate earbud-versus-case battery breakdown. Choose the Defunc if you value a case-based format and semi-in-ear design; pass if your main priority is longer stated runtime or two-device connection, which the supplied A3 details explicitly include.
• Best for longer stated battery life → Hmusic A3. It lists up to 35 hours, compared with 20 hours of total playtime for Defunc.
• Best for charging flexibility → Hmusic A3. It supports USB-C cable charging and wireless OTG charging; Defunc is described with a charging case.
• Best for connecting to two devices at once → Hmusic A3. That feature is specifically listed for the neckband.
• Best for a compact, case-based setup → Defunc True LITE II. Its separate semi-in-ear earbuds come with a charging case.
• Best for IPX4 water resistance → Defunc True LITE II. The A3’s supplied details do not list an IP water-resistance rating.
• Best for adjustable EQ modes → Hmusic A3. It offers Bass, Vocal, and Equilibrium modes.
• Best for a semi-in-ear fit → Defunc True LITE II. The A3 instead uses in-ear tips, with three sizes included.
• Best for low-latency gaming details → Hmusic A3. It specifies a 45 ms game mode, while Defunc only identifies low-latency performance without a figure.
The office decision comes down to how you work. If your headphones stay on through long stretches of calls, listening, and device changes, the A3’s neckband, two-device connection, and longer stated battery life make a strong practical case. If you want earbuds that disappear into a case when you leave your desk, Defunc’s format may fit better.
Neither product’s design makes it a headband headphone or a sleep headphone. Someone searching for the best rechargeable headband headphones for office is looking for a different format from these two. The same goes for the best sleep headphones for office: neither data sheet describes a sleep-specific design. For a neck-worn option, the A3 is the more relevant fit; among these two, it is also the clearer match for someone looking for the best neckband headphones for office, provided a neckband is what they want.
My Verdict
FAQ
Both list ENC-related call features: the A3 specifies an ENC microphone, and Defunc lists ENC clear calls. The A3 also lists connection to two devices, which may be useful when work involves switching between a computer and phone.
Hmusic A3 lists up to 35 hours of battery life. Defunc True LITE II lists up to 20 hours of total playtime; the provided details don’t break that total into earbud and case figures.
I can’t determine which costs less from the product details here. Check the current price on Amazon before deciding, then weigh it against the features you’ll actually use, such as the A3’s longer stated runtime or Defunc’s semi-in-ear case-based design.
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