Dr.Pen N2-W

Adjustable Needle Depth
The N2-W allows needle length adjustment from about 0.25 mm up to 2.5 mm, so you can customize for different skin areas and concerns. 

1. Multiple Speed Levels
   It has five speed settings to control how fast the needles move. 

2. Wireless + Wired Operation
   The device works both as a wireless (battery-powered) pen and with a power cable. This flexibility is useful especially where mobility matters (e.g. salon / travel).

3. Rechargeable Battery
   It uses a built-in rechargeable battery (around 250 mAh in many listings.
   The device can run for 2-3 hours on a charge in some cases. 

4. Cartridge Compatibility
   Supports a variety of needle cartridges: such as 9-pin, 12-pin, 24-pin, 36-pin, 42-pin; plus nano, nano-3D, nano-S cartridges, and pigment cartridges (1,3,5,7-pins) in some versions. 

5. High Speed / Punctures per Minute
   It delivers high-speed microneedling. Depending on seller / model spec, up to 10,000 punctures per minute is one common figure. Some listings mention up to ~12,000 RPM. 

6. Lightweight & Portable Design
   The device is fairly lightweight (~56 grams in many listings) and compact — making it easier to handle and good for travel. 

7. Safety & Hygiene Features

   • Uses single-use, sterile cartridges to reduce risk of cross-infection. 

   • Adjustable depth helps avoid over-penetration.

   • Plastic / ABS body in many models — lighter but check build quality. 

8. Applications / Benefits
   The N2-W is marketed to help with:

   • Improving skin texture

   • Reducing fine lines & wrinkles

   • Minimizing pores

   • Treating acne scars, stretch marks

   • Enhanced absorption of serums / other skincare actives after treatment 

9. Things to Know / Limitations

   • Deeper needle depths will have more downtime & risk — use with caution.

   • Quality & consistency may vary among sellers; ensure you get a genuine product, with good cartridges.

   • Might be noisy / vibration-noticeable depending on speed.

   • Not for use on active infections, open wounds, inflamed skin, or certain sensitive areas unless proper supervision.