EKO AQUA lets coaches speak directly to swimmers in real-time, transforming practice with instant feedback. Swimmers can adjust strokes, pace, and technique on the spot, correcting mistakes before they turn into bad habits.
Coach Every Stroke — Even Underwater
Stopwatch shouts and hand signals only go so far once a swimmer's head is under the water. EKO Aqua closes that gap. It's a bone conduction communicator built for swim coaches, squads, and clubs who need to deliver real-time feedback — stroke corrections, pacing, splits, turn cues — the moment it matters, not after the swimmer touches the wall.
Worn like an open-ear headset and transmitting sound through the cheekbone rather than the eardrum, EKO Aqua keeps ears completely open to the pool environment while still delivering crystal-clear instruction underwater. At just 45g, it's light enough to forget you're wearing it through a full training session, and its zero-drag, skin-friendly build won't interfere with stroke technique or add resistance in the water.
Built on a durable Nickel-Titanium alloy frame for long-term flex and comfort, and rated IP69 for racing-grade waterproofing, EKO Aqua is designed to survive daily squad training, not just the occasional dip. A 14-hour battery life means it comfortably covers a full day of back-to-back squad sessions without a mid-practice charge, and with a 155m full-pool teaching range plus 16-channel anti-interference support, coaches can run clear communication across a full 50m pool — even with multiple lanes, multiple devices, and a noisy deck in play.
EKO Aqua runs in 2-in-1 modes — a dedicated Transmission Mode for direct coach-to-swimmer audio across the pool deck, and a Bluetooth Mode for pairing with a phone or coaching app — so it adapts to however your squad already runs feedback sessions.
EKO Aqua is developed by SWONDER (鲸语), the original brand behind this bone conduction coaching technology, giving Swimshop2u customers genuine, factory-backed hardware rather than an unbranded import.
Built for every discipline that trains in the pool:
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Competitive swim squads — real-time stroke correction, pacing, and turn cues during set work
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Swim coaches and clubs — communicate instructions to swimmers across multiple lanes without stopping the set
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Artistic (synchronised) swimming — deliver timing and formation cues underwater during routine practice
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Water polo — relay tactical calls and positioning feedback during pool sessions
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Open water and triathlon swim training — pacing and technique cues during pool-based endurance sets
Whether you're coaching a national squad, a school swim team, or a weekend triathlon training group, EKO Aqua turns every lap into a coached lap.
Features
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Ultra-light, zero-drag design — 45g, skin-friendly build that won't interfere with stroke technique
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14-hour battery life — trains through a full day of squad sessions without a recharge
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155m full-pool teaching range — clear coach-to-swimmer communication across a full-size pool
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16-channel anti-interference support — stays clear even with multiple devices and lanes running at once
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IP69 racing-grade waterproof protection — built for daily training and competition conditions
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2-in-1 Modes — Transmission Mode for direct coaching, Bluetooth Mode for phone/app pairing
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Durable Nickel-Titanium alloy frame — long-term comfort and flex, built to last a full season
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Enhanced audio via bone conduction — crystal-clear instruction and feedback with ears left open to surroundings
| Spec |
Detail |
| Weight |
45g |
| Battery life |
Up to 14 hours |
| Teaching range |
Up to 155m (full pool) |
| Channels |
16-channel anti-interference |
| Waterproof rating |
IP69 (racing-grade) |
| Modes |
Transmission Mode + Bluetooth Mode |
| Frame material |
Nickel-Titanium alloy |
| Audio technology |
Bone conduction |
| Fit |
Open-ear, hanging-ear design |
| Brand / Manufacturer |
SWONDER (鲸语) |
| What's included |
Headset, carrying case, charging cable, user manual (confirm against your actual retail packaging)
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