1. Secondary key, removable 
2. The second-generation capacitor isolation mapping technology is used to improve the response speed and sensitivity 
3. Can record hand speed and replay 
4. Full micro-motion mechanical keys, shorter key travel, clear feedback 
5. The curved surface fits the human hand more and supports stable 
6. The head has a movable structure, which will not hurt your mobile phone and mobile phone case/membrane 
7. Compatible with mobile phones within 10.5mm thickness and 87mm width 
8. It can be fully charged in 1.5 hours, lasts for a long time, and can be played for 80 hours on one charge 
9. Small and portable