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| Is wireless | Yes | Wireless Type | Other |
| Support Memory Card | No | Vocalism Principle | Other |
| Volume Control | No | Control Button | No |
| Codecs | AAC | Private Mold | Yes |
| Battery Indicator | LED | Brand Name | kvance |
| Model Number | BTW91 | Style | In-ear |
| Communication | Wireless | Use | Portable Media Player, Mobile Phone, Gaming, Sports, Travel |
| Function | Waterproof, LED Display, Support Amazon Alexa, Support Apple Siri, Support Xiaomi AI Assistant, Support other AI Assistant, Support Google Assistant | Place of Origin | Shenzhen , China |
| Waterproof Standard | IPX-4 | Active Noise-Cancellation | NO |
| Wireless delay time | above 60 ms | Game atmosphere light | single color |
| Charging time | 1.5H | Color | Colors Customized |
| Standby time | 100 Hours | Battery capacity | 40mAh*2 |
| Music time | 3-3.5 Hours | Bluetooth Version | TWS V5.0 |
| Distance | 10-13m | Package | Customized Package |
| Talking time | 2-3.0 Hours | Weight | 4.1g |
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