1. 6-speed levels available --  adjustable intensity to fit different individual's tolerance.
2. LED display -- convenient to check the speed levels.
3. 2 models are available -- plug-in type and rechargeable type.
4. Low decibel -- the modified engine brings less noise.

This electric derma pen has a led display and comes with 2pcs of 16-pin needle cartridges. It combines micro-needling with electric vibration to enhance the efficiency of nutrients absorption, stimulate collagen regeneration, thereby firming the skin, smoothing wrinkles, and rejuvenate the skin.
Two models available-- plug-in & rechargeable: 

1. LED display
2. 6-speed levels
3. Adjustable needle length
4. Less noise with a modified engine