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| Manufacturer | Shenzhen City Billion Digital Electronic Manufacturing Co. Ltd. |
| Category | Smart device |
| Price | ￥ |
| Brand | Efn |
| Model | D20 |
| Listing Time | 2023 /5/10 |
| Source category | Cash |
| Materials | ABS |
| Product size | - What? |
| Touch screen | Yes |
| Battery capacity | 18m Ah |
| Interface | Type-C |
| Process | - What? |
| Add LOGO | Yeah. |
| Screen Size | None |
| Applicable Object | Universal |
| Appearance Size | - What? |
| Product weight | 7g |
| Population applicable | Universal |
| Applicable platform | Universal |
| Body memory | - What? |
| Camera | - What? |
| The way you wear it. | Ring ring. |
| Additional Functions | None |
| Wireless distance | 10m |
| Screen Resolution | - What? |
| Screen Materials | - What? |
| Operation | Key |
| Compatible platform | - What? |
| Best delivery time. | 48H |
| Do you support a surrogate? | - What? |
| Whether mixed groups are supported | - What? |
| Support for proxy membership | Support |
| Colour | Black, white, pink. |
| There's an authorized brand. | Yes. |
| Whether or not to export a source of goods exclusively across borders | Yes. |
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