We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-04 · 7 min read · Independent comparison
If you want the longest battery life and Hi-Res LDAC tuning in a feather-light clip-on you can wear all day at a desk, choose EarFun Clip Open Ear; if you need the sweat-proof, ultra-light sport build with four-mic call clarity and remote camera control, choose OpenRock S2. Both are open ear TWS earbuds that leave your ear canal open, which is exactly why they work so well for computer use — you hear your call, your music, and the room around you at the same time.
• EarFun Clip Open Ear — biggest strength: 40 hours total playtime with a 10-hour single-charge run and a 10-minute quick charge that returns 2.5 hours, backed by LDAC and Hi-Res audio from a 10.8mm carbon driver and Bluetooth 6.0 with dual-device multipoint.
• EarFun Clip Open Ear — biggest trade-off: It has no active noise cancellation and no IP rating beyond IP55, so it's built for sweat and weather, not for blocking out a noisy office or a windy street.
• OpenRock S2 — biggest strength: A 7g hook-clip body with 0.6mm titanium filaments, triple sweat defense, four-mic AI call noise cancellation, and a remote camera shutter button — a genuinely sport-first design.
• OpenRock S2 — biggest trade-off: Shorter endurance at 8 hours per charge / 32 hours with the case, and a 5-minute quick charge that only returns 1 hour.
• Pick EarFun Clip Open Ear if you want the longest wear time and the richer codec story for long work sessions, commuting, and everyday listening.
• Pick OpenRock S2 if you want the lightest possible fit, the most sweat-proof construction, and the best call handling for outdoor training and travel.
The EarFun Clip is a C-shaped clip-on built around a 0.55 titanium memory wire and liquid silicone, and the design brief here is clearly "wear it and forget it." EarFun says the bridge was shaped using flex testing and long-term wearing data to follow the ear contour and cut pressure — and the spec sheet backs the intent: 49g total for the set, an open-ear placement that never plugs the canal, and a physical push-button control layout instead of touch surfaces. If you've ever fought with touch controls that fire off when you adjust your glasses, that button detail matters more than it sounds.
Battery is the headline: 10 hours per charge, 40 hours with the USB-C case, and a 10-minute top-up for 2.5 hours of playback. IP55 covers gym sweat and light rain. Calls run through dual mics with AI environmental noise cancellation.
Buy it if you want long sessions, LDAC sound, and a button-controlled clip-on for work, commuting and workouts. Skip it if you need active noise cancellation — the sheet lists noise control as "None," so these are awareness-first earbuds, not isolation-first ones.
OpenRock S2: Who It's For
OpenRock S2 takes the opposite approach: shave everything down and harden it. At just 7g per earbud, with 0.6mm titanium filaments and soft liquid silicone, the hook-clip is designed to flex to different ear shapes and stay comfortable through long outdoor sessions. The 132g figure is the item weight including the case and packaging, not the earbud — the number that actually matters on your ear is that 7g.
The audio story is built around BassDirect, which channels low-frequency energy from a 12mm dynamic driver straight toward the ear canal while limiting leakage. The driver covers 20 Hz to 40,000 Hz, and with LDAC and Hi-Res certification you get high-resolution transmission for detailed playback. Impedance is 22 ohm, a touch easier to drive than the EarFun's 32 ohm, though with Bluetooth that's more a design note than a practical difference.
Where the S2 pulls ahead is durability and calls. The triple sweat defense is a real structural design: an angled fit that lets sweat slide off, a sealed BassDirect cavity that shields the PCBA from moisture, and a nano-coating on the internal electronics. It's listed as IPX5 waterproof. Four microphones in a beamforming array with AI noise cancellation and a wind-resistant structure handle voice pickup — that's double the mic count of the EarFun, and it shows in the spec's focus on windy, outdoor calls.
Two extras stand out. First, the remote camera control: press the button on the earbud and you trigger your phone's shutter while it's in photo or video mode — genuinely useful on a hike. Second, Bluetooth 6.0 with multipoint for two simultaneous devices, plus a 10-meter range. Battery runs 8 hours per charge, 32 hours with the charging case, and 5 minutes of charging returns 1 hour. Warranty is 2 years versus EarFun's 18 months.
Buy it if you train outdoors, sweat heavily, take a lot of calls in the wind, and want the lightest fit available. Skip it if you want maximum total playtime or you'd rather have a physical button layout with an app for EQ and modes — the S2's app control is listed, but the endurance gap is the honest trade-off here.
• Best battery life → EarFun Clip Open Ear. 10 hours per charge and 40 hours total beats 8 and 32, and its 10-minute charge yields 2.5 hours versus 1 hour on the S2.
• Best for heavy sweating and rain → OpenRock S2. The triple sweat defense, sealed cavity and nano-coating are purpose-built for moisture in a way IP55 alone isn't.
• Best call clarity in wind → OpenRock S2. Four mics with beamforming and a wind-resistant structure outgun the EarFun's dual-mic AI setup on paper.
• Best for computer and desk work → EarFun Clip Open Ear. LDAC, dual-device multipoint, button controls and long endurance make it the easier all-day companion for a laptop.
• Lightest on the ear → OpenRock S2. 7g with 0.6mm titanium filaments is about as minimal as a clip-on gets.
• Best for outdoor content and hiking → OpenRock S2. The built-in remote camera shutter is a feature the EarFun simply doesn't have.
• Most customizable sound → EarFun Clip Open Ear. The EarFun app gives you EQ presets, listening modes and custom controls in one place.
• Longest warranty → OpenRock S2. Two years versus the EarFun's 18 months.
In my opinion, the EarFun Clip Open Ear is the one I'd buy for a computer-first, all-day routine. Forty hours of total playback, LDAC with a 10.8mm carbon driver, dual-device multipoint and physical buttons add up to a headphone that disappears into a workday and still handles a run afterward. I'd only steer you to the OpenRock S2 if sweat, wind and weight are your top three concerns — its 7g build, triple sweat defense and four-mic array are the better answer for hard outdoor training. Do check the current price on Amazon before deciding, since both sit in the same budget-friendly open-ear space and the value math shifts with whatever each is going for.
FAQ
Pair over Bluetooth 6.0, and because both support multipoint you can keep two devices connected at once — a laptop and a phone, for example — and switch between them. The EarFun Clip adds Google Fast Pair for Android users, and both offer app-based control for EQ and button customization.
Both models use push-button control rather than touch, which cuts down on accidental triggers. On the EarFun Clip the buttons handle playback, volume and calls. On the OpenRock S2 the button also doubles as a remote camera shutter when your phone is in photo or video mode.
Open the charging case and lift the earbuds out — they power on and enter pairing. The EarFun Clip charges over USB-C and gives 2.5 hours of playback from a 10-minute charge; the OpenRock S2 delivers 1 hour from a 5-minute charge and uses a wireless charging case.
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