True Wireless
KZ S2
58Average
$30
Full review dataKZ S2 vs Realme Buds Air 7: which should you buy?
On aggregated review scores the Realme Buds Air 7 comes out ahead with an HearWiki score of 78. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: Realme Buds Air 7 - Great overall at around $59.
True Wireless
Realme Buds Air 7
78Great
$59
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
KZ S2
Sound5.5
Battery3.0
Calls4.8
Value5.0
Realme Buds Air 7
Sound7.5
Noise cancelling7.0
Battery8.0
Calls7.0
Value8.5
Specifications
| Spec | KZ S2 | Realme Buds Air 7 |
|---|---|---|
| Type | True Wireless | True Wireless |
| Price (USD) | $30 | $59 |
| HearWiki score | 58 / 100 · Average | 78 / 100 · Great |
| Released | 2020 | 2025 |
| Audio | ||
| Driver | hybrid | dynamic |
| Driver size | 7 mm | 12.4 mm |
| Drivers per side | 2 | 2 |
| Frequency response | 20Hz-40000Hz | 20 Hz - 20,000 Hz |
| Impedance | 24 Ω | 32 Ω |
| Sensitivity | 98 dB/mW | - |
| Wireless | ||
| Bluetooth | 5.0 | 5.x |
| Bluetooth version | 5.0 | 5.4 |
| Codecs | SBC, AAC | SBC, AAC, LHDC |
| Multipoint pairing | No | Yes |
| Latency | - | 45 ms |
| Wireless range | 20 m | 10 m |
| Battery | ||
| Battery life | 3 h | 13 h |
| Battery life (ANC on) | - | 7.5 h |
| Battery incl. case | 18 h | 52 h |
| Full charge time | 120 min | 120 min |
| Quick charge | - | 10 min = 10 h |
| Wireless charging | No | No |
| Features | ||
| Active noise cancelling | No | Yes |
| ANC type | - | adaptive |
| Transparency mode | - | Yes |
| Companion app | - | Yes |
| Custom EQ | - | Yes |
| Wear detection | - | No |
| Controls | - | touch |
| Voice assistant | - | Google Assistant |
| Design | ||
| Weight | - | 50 g |
| Case weight | - | 40 g |
| Water resistance | IPX5 | IP55 |
| USB-C | Yes | Yes |
| Calls | ||
| Microphones | - | 6 |
| Call noise reduction | - | 6-mic AI call noise reduction |
What reviewers said
KZ S2
The KZ S2 are budget true wireless earbuds that offer a hybrid dual-driver setup, Bluetooth 5.0 with multipoint, and a lightweight, comfortable fit. While they deliver punchy bass and clear detail for the price, their short single-charge battery life, occasional treble harshness, and inconsistent wireless performance keep them from being a standout in their class.
- Pro:Very affordable
- Pro:Comfortable and lightweight fit
- Pro:Strong bass and clear detail
- Con:Short battery life per charge
- Con:Treble can be harsh or splashy
- Con:Connection stability issues reported
Realme Buds Air 7
The Realme Buds Air 7 are budget-friendly true wireless earbuds that combine hybrid active noise cancellation with a punchy 12.4mm dynamic driver. They offer strong battery longevity, multipoint pairing, and a clear, natural sound profile with a bass-forward tilt, making them a versatile pick for everyday use under $50. With IP55 durability and LDAC support, they pack impressive features for the price.
- Pro:Excellent battery life, especially with the charging case
- Pro:Effective hybrid ANC for the price
- Pro:Supports LDAC and multipoint connectivity
- Con:Bass may feel overpowering for some listeners
- Con:No wireless charging support
- Con:Touch controls can be overly sensitive
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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