vs
9.7Battery5.7
Why is Sleep A20 better than REAL Blue TWS 3?
- Battery life14 h vs 9 h+56%
- Charging time1.5 h vs 2 h+33%
Why is REAL Blue TWS 3 better than Sleep A20?
- Lowest frequency20 Hz vs 10 Hz2×
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | — | Closed-back |
| Driver type | — | Dynamic |
| Driver size | — | 12 mm |
| Lowest frequency | 20 Hz | 10 Hz |
| Highest frequency | 20,000 Hz | 20,000 Hz |
| Impedance | 16 Ω | — |
| Adjustable equaliser | Yes | — |
| Noise control | ||
| Active noise cancelling | — | Yes |
| Transparency / ambient mode | — | Yes |
| Battery & charging | ||
| Battery life | 14 h | 9 h |
| Battery life with ANC | — | 5 h |
| Total with charging case | — | 37 h |
| Battery capacity | — | 45 mAh |
| Charging time | 1.5 h | 2 h |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.3 | 5.3 |
| Bluetooth codecs | AAC, SBC | AAC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | No |
| aptX | No | No |
| LDAC | No | No |
| Multipoint (two devices) | — | Yes |
| USB-C | Yes | Yes |
| Design & build | ||
| Earbud weight (each) | 3 g | — |
| Protection rating | IPX4 | IPX4 |
| Water resistance (IPx) | IPx4 | IPx4 |
| Features | ||
| Touch controls | Yes | — |
