How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-27 · 7 min read · Independent comparison
• ASUS ROG Delta II — biggest strength: Tri-mode wireless (2.4 GHz ROG SpeedNova, Bluetooth, and 3.5 mm wired) plus DualFlow Audio, so you can hear game audio and a second source at the same time.
• ASUS ROG Delta II — biggest trade-off: It's a full over-ear headset with a detachable mic, so it's bulkier and far more involved than a pair of clip-on earbuds.
• SoundAI A3 — biggest strength: An open-ear, sub-5g-per-bud design with memory titanium wire loops, IPX4 sweat resistance and 32 hours of total playtime with the case.
• SoundAI A3 — biggest trade-off: Open-ear means it physically cannot seal off your ears, and its Bluetooth-only connection makes it a poor fit for low-latency competitive gaming.
• Who ASUS ROG Delta II is for: PC, PS5, Xbox and Switch players who want one headset for long sessions, voice chat and multi-source audio.
• Who SoundAI A3 is for: Runners, gym-goers, commuters and office users who want light, situational-awareness-first earbuds with an AI translation app.
The ROG Delta II is built around the idea that a gaming headset should be able to do several jobs at once. Its 50 mm titanium drivers cover a 20 Hz–20 kHz range, and the tuning is described as pushing crisp, detailed treble while cutting distortion — the goal being balanced, lifelike in-game sound rather than a bass-only thump. The DualFlow Audio feature is the real differentiator here: it lets two separate sources play at once, so you can keep a podcast or music running underneath a match, or take a phone call with a single earcup button press instead of pausing the game.
For communication, the detachable mic is rated at an MOS-LQO score of 4.2 in call-quality testing — above the 3.9 figure cited as a common team standard — which tells you voice pickup was treated as a first-class feature and not an afterthought. Each earcup also carries its own scroll wheel, so game audio and chat volume can be adjusted independently without digging through menus. Connectivity is genuinely flexible: 2.4 GHz via ROG SpeedNova for low-latency wireless, Bluetooth for mobile devices, and a 3.5 mm analog jack for anything wired. It's listed as compatible with PC, Mac, PlayStation 4 and 5, Switch, Xbox and mobile.
Who should buy it: anyone who wants one headset that covers competitive play, casual listening and calls, and who values a long battery figure — ASUS lists a 15-minute charge time and an average battery life of 150 hours, which is the kind of number that means you stop thinking about charging entirely.
SoundAI A3: Who It's For
The SoundAI A3 (model FairyClip A3) goes in the opposite direction. Each earbud weighs under 5 grams, and the flexible loops use memory titanium wire to hook gently over the ear without pressure — the whole pitch is "barely-there" wear for long hours. Because the design is open-ear, you never block your ear canal, which is exactly what you want when you need to hear traffic, a training partner or a colleague walking up behind you.
Battery is split into two useful numbers: up to 8 hours on a single charge and up to 32 hours total with the charging case. The IPX4 rating covers sweat and light rain, so it survives workouts and drizzly commutes without drama. Sound is handled by directional audio technology that aims to keep output rich and balanced while limiting leakage, so people around you aren't hearing your call. Calls run through a built-in mic, and there's an app layer that adds real-time AI translation across multiple languages plus device tracking.
Controls are touch-based and app-assisted, and the buds ship with a charging case, cable and manual in gift packaging. Note one spec contradiction worth flagging honestly: the listing describes the design as open-ear while also listing active noise cancellation under noise control. Open-ear buds can't seal your ears the way over-ears do, so treat ANC here as a feature claim rather than a promise of isolation.
Who should buy it: runners, gym users, commuters and office workers who want lightweight earbuds for calls and music while staying aware of their environment, and anyone curious about on-the-fly translation in a travel or multilingual-work context.
Who should skip it: competitive gamers who need sub-frame audio sync, and anyone who wants deep isolation on a noisy flight. There's no headphone jack either — it's wireless only.
Side-by-Side: Which Should You Choose?
• Best for battery endurance → ASUS ROG Delta II. A 150-hour average battery life versus 32 hours total for the A3.
• Best for all-day light wear → SoundAI A3. Under 5 g per bud with memory titanium wire loops beats a full over-ear headset for fatigue over long days.
• Best for running and sweaty workouts → SoundAI A3. IPX4 sweat and light-rain resistance; the ROG Delta II has no water-resistance rating in its specs.
• Best for multi-device multitasking → ASUS ROG Delta II. DualFlow Audio plays two sources at once and lets you take a call without pausing the game.
• Best for staying aware of your surroundings → SoundAI A3. Open-ear by design, so nothing blocks your ear canal.
• Best for voice chat quality → ASUS ROG Delta II. The detachable mic carries a measured call-quality score, and per-earcup scroll wheels separate game and chat volume.
• Best for travel and everyday phone use → SoundAI A3. Pocketable case, touch controls, and an app with translation and tracking features.
If I were buying for myself and my priority were gaming on PC or console — long sessions, voice chat, and juggling a podcast or a call mid-match — I'd buy the ASUS ROG Delta II. The tri-mode connection and DualFlow Audio are features you actually feel every session, and that 150-hour battery figure removes a daily annoyance. If instead my days are split between runs, commutes and desk work, I'd take the SoundAI A3: the sub-5g open-ear fit and IPX4 rating match that life far better than a headset ever could. Two different jobs, two different answers — pick the one that matches how you actually spend your hours.
Yes, in my opinion, if latency and voice chat matter. The ROG Delta II uses 2.4 GHz ROG SpeedNova wireless with a dedicated detachable mic and independent volume wheels, while the A3 is Bluetooth-only with no gaming-oriented low-latency mode listed.
Can the SoundAI A3 be used for PC gaming?
The ASUS ROG Delta II, by a wide margin. It's listed at 150 hours average battery life with a 15-minute charge time. The SoundAI A3 offers up to 8 hours per charge and 32 hours total with its case.
Only the SoundAI A3 carries a water-resistance rating — IPX4, which handles sweat and light rain. The ROG Delta II's specs list no water resistance, so I'd keep it away from heavy moisture.
Both are different classes of product, so check the current price on Amazon before deciding — the page's button will show you live pricing. Compare that against what you actually need: gaming and multi-source audio, or lightweight open-ear wear.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.
See also: Lenovo 115 vs PROAR 4-Channel, Altec Lansing Kid Safe 2-in-1 vs XANAD Hard Case, SOAR NFL Active Noise vs TOZO HT3, Micool Open Ear Headphones vs Cubitt Tracking Technologies Power Earbu