The Arc 4 is an open-ear true wireless earphone from Cleer Audio, sitting in the Arc 4 series next to the Arc 4 Plus and between the older Arc 3 and newer Arc 5 families. Cleer announced the series as the first open-ear true wireless earbuds with THX certification, and the Arc 4 also carries Dolby Audio processing. The series was unveiled around CES 2026, and the list price is USD 99.99. Hooks sit over the ear and the drivers rest outside the ear canal, which keeps traffic and voices audible while commuting, working or running.
Key specs that matter
Each bud uses a 16.2 mm driver, and the frequency range is 65 Hz to 40 kHz, which qualifies it for Hi-Res Audio labelling. Bluetooth 5.4 runs on Qualcomm Snapdragon Sound, with aptX Adaptive, aptX Lossless, LC3, AAC and SBC codecs supported. The buds play for up to 7 hours per charge and the case brings the total to 32 hours. Ten minutes of charging gives two hours of playback. The case charges over USB-C. One earbud weighs 10.8 g, and both buds plus case come to 76 g.
Engineering and use context
Because an open-ear design leaves the canal free, the Arc 4 has no seal to block outside noise, so it is built for situational awareness rather than isolation. The IPX7 rating means the buds can survive sweat, rain and brief immersion, which fits workouts and outdoor use. Calls go through a two-microphone array with Qualcomm cVc Clear Voice Capture processing to cut background noise from the voice pickup. Multipoint connection lets the buds stay linked to two devices and switch between them. Settings can be customised through the Cleer+ app, and an adaptive volume function changes the level as surrounding noise changes.
Pairing
The Arc 4 pairs with any phone, tablet or computer that has Bluetooth, and the lossless and adaptive aptX modes need an Android phone with a compatible Snapdragon Sound chipset. Apple devices will connect over AAC, while LC3 is the codec for newer LE Audio sources. Since the low-frequency extension is limited and the fit is open, the Arc 4 is aimed at podcasts, calls and music during activity rather than deep bass in loud places. Callers on Android, iOS or Windows can use the same pair thanks to the multipoint link and the standard AAC and SBC profiles.
Alternatives
The Cleer Arc 4 Plus is the step-up open-ear model in the same series, adding Dolby Atmos and a longer total battery life of up to 34 hours.