1more Open Earbuds S51 Black Wireless In-ear headphones

Open-Ear Wireless Earbuds for Runners, Commuters, and All-Day Listeners

The 1MORE Open Earbuds S51 Black take a different approach to true wireless audio: instead of sealing the ear canal, the speaker sits on top of it, leaving the ear open to the world. For anyone who has missed a station announcement or a car horn while wearing in-ear buds, this design flips the script — music plays, but the environment stays audible. The clip-on shape pairs with BalanceAIR+ technology to stay put during runs, workouts, or long desk days.

What Sets the S51 Apart in the Open-Ear Category

A four-microphone array with DNN noise reduction cleans up voice calls, so sidewalk conversations and café Zoom calls come through clearly even with traffic in the background. A dedicated gaming mode drops latency to under 80 ms, fast enough for mobile shooters and rhythm games where audio sync matters.

Technical Specifications

The numbers behind the comfort and sound translate directly into how the S51 performs in real use.

• Earbud Weight: 9.5 g per bud — light enough to forget they're on, even after hours of wear
• Material: memory titanium alloy — flexible frame that holds its shape during movement
• Battery Life: 11 h per charge, 40 h with case — covers a full work day plus commute
• Bluetooth: 5.3 with dual-device pairing — stable, low-power connection that switches between phone and laptop
• Water Resistance: IPX5 — shrugs off sweat and rain during outdoor workouts

Who the 1MORE S51 Is Built For

The 1MORE Open Earbuds S51 Black are the right choice for active listeners who need music without losing touch with their surroundings. Outdoor runners and cyclists get traffic awareness without removing an earbud. Office workers and remote employees can take calls and listen to focus music while still hearing colleagues and family members at home. Anyone who finds traditional in-ear tips uncomfortable will appreciate the clip-on fit during long sessions or back-to-back meetings.

1MORE Sound Engineering and the LUCA Tuning Story

1MORE has built its reputation around studio-grade tuning at consumer prices, partnering with Grammy Award-winning mastering engineer Luca Bignardi. The S51 carries six EQ presets shaped by Bignardi's work, accessible through the 1MORE mobile app.