9.09 in 3.43 in  | 2.64 in 7.09 in  | |
| Available colors | ||
| Editiorial reviews | ||
| User rating |
 Sony SRS-XB31 |  Ultimate Ears Boom 2 | |
|---|---|---|
| Channels | 2.0 | 2.1 |
| Low frequency | 20.0 Hz | 90.0 Hz |
| High frequency | 20.0 kHz | 20.0 kHz |
| Number of drivers | 2 | 2 |
| Sony SRS-XB31 | Ultimate Ears Boom 2 | |
|---|---|---|
| Colour of product |
|
|
| Built-in display | no | yes |
| Sony SRS-XB31 | Ultimate Ears Boom 2 | |
|---|---|---|
| Height | 3.43 in | 7.09 in |
| Width | 9.09 in | 2.64 in |
| Depth | 3.19 in | 2.64 in |
| Weight | 31.39 oz | 19.33 oz |
| Sony SRS-XB31 | Ultimate Ears Boom 2 | |
|---|---|---|
| USB | yes | yes |
| Type of USB connector | Micro-USB | Micro-USB |
| AUX in | yes | yes |
| Bluetooth | yes | yes |
| Bluetooth codec |
| SBC |
| Bluetooth profile |
|
|
| Bluetooth version | 4.2 | 4.1 |
| Bluetooth wireless range | 98.43 ft | 328.08 ft |
| Analogue 3.5mm input (Aux) | 1 | 1 |
| Wireless network (Wi-Fi) | no | no |
| NFC | yes | yes |
| Sony SRS-XB31 | Ultimate Ears Boom 2 | |
|---|---|---|
| Docking station for mobile/Tablet | yes | no |
| USB input port | yes | yes |
| IP code (level of dust/water resistance) | IP67 | IPX7 |
| Sony SRS-XB31 | Ultimate Ears Boom 2 | |
|---|---|---|
| Battery operated | yes | yes |
| USB powered | yes | yes |
| Battery type | Li-Ion | Li-Ion |
| Playback time | 24.0 h | 15.0 h |
| Battery life (max) | 24.0 h | 15.0 h |
| Pros | ||
|---|---|---|
| Cons |
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