7.91 in 2.36 in  | 5.31 in 5.89 in  | |
| Available colors | ||
| Editiorial reviews | ||
| User rating |
 Jam Heavy Metal |  Ultimate Ears Roll 2 | |
|---|---|---|
| Channels | 1.0 | 1.0 |
| Low frequency | 120.0 Hz | 108.0 Hz |
| High frequency | 15.0 kHz | 20.0 kHz |
| Peak power | 20.0 W | 6.0 W |
| Number of drivers | 2 | 1 |
| Jam Heavy Metal | Ultimate Ears Roll 2 | |
|---|---|---|
| Colour of product |
|
|
| Jam Heavy Metal | Ultimate Ears Roll 2 | |
|---|---|---|
| Height | 2.36 in | 5.89 in |
| Width | 7.91 in | 5.31 in |
| Depth | 2.48 in | 5.31 in |
| Weight | 26.88 oz | 11.64 oz |
| Jam Heavy Metal | Ultimate Ears Roll 2 | |
|---|---|---|
| USB | yes | yes |
| Type of USB connector | Micro-USB | Micro-USB |
| AUX in | yes | yes |
| Source of connection |
|
|
| Aptx Support | no | no |
| Bluetooth | yes | yes |
| Wired inputs |
|
|
| Bluetooth version | 4.0 | 4.1 |
| Bluetooth wireless range | 29.53 ft | 100.0 ft |
| Analogue 3.5mm input (Aux) | 1 | 1 |
| Wireless network (Wi-Fi) | no | no |
| Jam Heavy Metal | Ultimate Ears Roll 2 | |
|---|---|---|
| Docking station for mobile/Tablet | no | no |
| Radio receiver | no | no |
| Smart speaker (virtual assistant) | no | no |
| USB input port | yes | yes |
| Jam Heavy Metal | Ultimate Ears Roll 2 | |
|---|---|---|
| Battery operated | yes | yes |
| USB powered | yes | yes |
| Electric (not USB) | no | no |
| Battery type | Li-Ion | Li-Ion |
| Playback time | 8.0 h | 9.0 h |
| Battery life (max) | 8.0 h | 9.0 h |
| Pros | ||
|---|---|---|
| Cons |
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