Image © TOZOPricey for what it is
The TOZO O2 Open Buds are lightweight true open-ear wireless earbuds featuring a biaxial rotation design for customizable fit, 14.2mm dynamic drivers for powerful bass, and DSP call noise cancellation. They offer up to 42 hours of total battery life with the charging case and IPX6 water resistance.
The TOZO O2 Open Buds are an affordable open-ear option aimed at active users, offering a secure fit, reliable Bluetooth 5.3 connectivity, and a substantial 42-hour total battery life with the charging case. While the 14.2 mm drivers deliver adequate, crisp sound for the price, audiophiles may find the audio performance functional rather than exceptional, and real-world battery life might not always match the manufacturer's claims.
Paraphrased from published reviews & specs - not an original hands-on test. Our AI disclosure.
| Driver | 14.2 mm dynamic |
|---|---|
| Driver type | dynamic |
| Driver size | 14.2 mm |
| Drivers per side | 1 |
| Frequency response | 20 Hz - 20 kHz |
| Driver | 14.2 mm dynamic |
|---|---|
| Driver type | dynamic |
| Driver size | 14.2 mm |
| Drivers per side | 1 |
| Frequency response | 20 Hz - 20 kHz |
| Bluetooth | 5.3 |
|---|---|
| Codecs | SBC, AAC |
| Multipoint pairing | No |
| Wireless range | 10 m |
| Battery life | 12 h |
|---|---|
| Battery incl. case | 42 h |
| Full charge time | 90 min |
| Wireless charging | Yes |
| Active noise cancelling | No |
|---|---|
| Companion app | Yes |
| Custom EQ | Yes |
| Controls | touch |
| Voice assistant | Yes |
| Water resistance | IPX6 |
|---|---|
| USB-C | Yes |
| Microphones | 1 |
|---|---|
| Call noise reduction | Yes |
| Call NR technology | noise-cancelling mic |
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4 source(s) feeding this product's score.
Video reviews we found, each condensed to its verdict. They do feed the HearWiki score, at a measured weight below what a published written review carries.
Reviewers agree the TOZO O2 Open Buds offer a comfortable, adjustable open-ear fit and strong value for the price, with one praising the long battery life and dual-device connectivity while another highlighted excellent call quality.
5:31The reviewer bought the TOZO O2 Open Buds to use while walking outdoors, valuing the open-ear design for situational awareness. They found the ergonomics comfortable and the call quality excellent, but were disappointed with the sound quality at higher volumes, noting it became tinny. Overall, they consider the earbuds a great value for the low price, despite the cheap-feeling charging case and average audio performance.
6:54The reviewer is a long-time fan of TOZO and finds the O2 Open Buds to be an excellent open-ear option, especially for people with smaller ears. They praise the comfortable, adjustable fit, impressive battery life, and seamless dual-device connectivity, concluding that the earbuds offer great value and quality.
Summaries are AI condensations of each video's own conclusion, not transcripts. Titles, thumbnails and view counts belong to their channels.
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