Nue wireless battery-powered dermograph with adjustable voltage from 4V to 12V requires careful selection of components to ensure longer battery life, efficient power management, and consistent performance. 

Specifications:
1. Voltage Range: 4V to 12V adjustable
2. Battery Type: Lithium-ion rechargeable battery
3. Battery Capacity: 2000mAh to 3000mAh (higher capacity for longer battery life) Allow the device to charge fully (approximately 2 hours).
4. Motor: Coreless DC motor (known for efficiency and smooth operation)
5. Control: Digital voltage control with display
6. Charging Method: USB-C fast charging
7. Operating Time: Up to 4-6 hours on a single charge (depending on usage and voltage setting)
8. Weight: Lightweight for ease of use and reduced hand fatigue
9. Designed to minimize noise for a more pleasant working environment.
10. LED Indicator: Shows battery level and charging status.