If you want longer listed battery life and a 16 mm driver, choose Monster Open Free AC100; if you need Bluetooth 6.0, touch controls, and a charging dock, choose Monster Open Ear AC360. For commuting, I’d lean toward the AC100 for its 30-hour battery figure, while the AC360 is the better fit if its newer Bluetooth version and carry lanyard matter more to you.
• Monster Open Free AC100: Its listed 30-hour battery life and 16 mm dynamic driver are the standout strengths; the trade-off is that it uses Bluetooth 5.3 rather than the AC360’s newer Bluetooth 6.0.
• Monster Open Ear AC360: Bluetooth 6.0, touch controls, and a charging dock give it a distinctive feature set; its listed total battery life is 24 hours.
• Both use an open-ear design, so neither is intended to seal off surrounding sound.
• Choose the AC100 if longer listed battery life and the larger stated driver are your priorities.
• Choose the AC360 if you prefer touch control, a lanyard, and Bluetooth 6.0.
The AC100 is an open-ear, earhook-style wireless headphone with Bluetooth 5.3 and a 16 mm dynamic driver. Its listed battery life is 30 hours. The open design is meant to let you listen without fully blocking your ears, which may appeal on a commute where staying aware of nearby sounds matters. The product information also describes a water-resistant nano-coating intended to help protect against sweat and rain splashes.
That combination makes the AC100 a sensible option for someone who wants a simple, longer-running pair for regular listening, outdoor trips, or workouts. Its earhook shape offers a different fit from conventional in-ear buds, and the larger stated driver may matter to listeners who want to compare driver size when choosing.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-09 · 5 min read · Independent comparison
The AC360 is an open-ear wireless model with Bluetooth 6.0 and touch controls. It comes with a lanyard and a charging dock; the stated total battery life is up to 24 hours with the dock, while a single use is described as up to eight hours. Its IPX5 rating is specified for water resistance, with the product information describing protection against rain and sweat.
I’d consider it if you want a feature-focused option for commuting or active use, especially if you value newer Bluetooth, touch operation, and a way to carry the headphones with the included lanyard. The dock-based battery figure could suit someone who prefers to recharge between listening sessions rather than prioritize the longer 30-hour figure listed for the AC100.
The trade-off is that the AC360’s total listed battery life is six hours shorter than the AC100’s. Its product details also list no noise control, so don’t choose it expecting active noise cancellation. Open-ear listening can keep you more aware of your surroundings, but it is not the same as blocking outside sound.
• Best for longer listed battery life → Monster Open Free AC100. Its stated 30 hours compares with the AC360’s 24 hours when using the charging dock.
• Best for Bluetooth version → Monster Open Ear AC360. It lists Bluetooth 6.0, while the AC100 lists Bluetooth 5.3.
• Best if a larger stated driver matters → Monster Open Free AC100. Its specifications name a 16 mm dynamic driver; the AC360’s supplied details do not state a driver size.
• Best for touch controls → Monster Open Ear AC360. Touch control is specified; the AC100 lists media controls operated remotely.
• Best for an included carry lanyard → Monster Open Ear AC360. The lanyard is listed among its included features.
• Best for a stated 10-meter Bluetooth range → Monster Open Free AC100. That range appears in its connectivity details; no range is provided for the AC360.
• Best for a stated IPX5 rating → Monster Open Ear AC360. The AC100 describes a water-resistant coating for sweat and rain splashes, but does not provide an IP rating in the supplied specifications.
• Best for someone who wants open-ear listening on a commute → Either, depending on priorities. Choose the AC100 for longer listed battery life; choose the AC360 for Bluetooth 6.0, touch control, and its lanyard.
Neither is a conventional over-ear headphone. If you searched for hifi stereo over ear headphones for commuting, note that both products are described as open-ear models instead. Likewise, “lightweight sleep headphones for commuting” combines two different use cases: these are open-ear headphones for everyday listening, not a listed sleep-specific design.
I’d choose the Monster Open Free AC100 for commuting because its listed 30-hour battery life gives it the clearest practical edge for longer stretches between charges. The 16 mm driver is another concrete point in its favor, though driver size alone does not establish overall sound quality.
I’d pick the AC360 instead if Bluetooth 6.0, touch controls, or the included lanyard mattered more to my daily routine. My overall choice is the AC100, but the AC360 has a distinct feature set rather than simply being a weaker alternative.
The AC100 lists 30 hours of battery life, compared with up to 24 hours for the AC360 with its charging dock. The AC360 offers Bluetooth 6.0 and touch controls, so your choice comes down to battery life versus those features.
Both are open-ear designs, so neither is described as sealing off the ears. The AC100 lists active noise cancellation, while the AC360 lists no noise control; the supplied information does not establish that either blocks commuting noise like a sealed headphone.
The AC100 lists 30 hours. The AC360 is described as lasting up to eight hours per use and up to 24 hours with its charging dock.
How do the AC100 and AC360 compare for water resistance?
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