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| Brand | Other |
| Goods number | N21 |
| Transmission | 10meter |
| Function | Water proof, Long range, Call function, Voice control, Support music, Number display screen |
| Bluetooth protocol | 5.2 |
| How to use | Earplug |
| Whether to | Double-sided, three dimensional |
| There is an authorized self -owned brand | No |
| (Cross-border trading) | No |
| Support customization | Support |
| Is it a patent source? | No |
| Mold | Private model |
| Chip type | Unreasonable |
| Battery life | 4-8 hours |
| Year/season of release | 2022 |
| Style | Sporty style |
| Waterproof performance | Life waterproof |
| Only change or not | Support |
| Material | Plastic |
| Color | N21 black (flashlight+LED number showing), N21 white (flashlight+LED number showing) |
