• New version electric derma pen equipped with LCD screen indicating 7 speed levels. • Easily adjust the 7 speed gears from 6,000 rpm to 24,000 rpm by briefly pressing the power button. • Cartridge length can be adjusted from 0.25 to 2.5 mm by turning the dial. • Includes 12 individually sealed cartridges (6 of 12 pins and 6 of 36 pins), safe, convenient, and hygienic. • Needle cartridges are disposable and single-use to prevent cross-infection. • Professional stainless steel cartridges, hardened without dyes, and full metal housing. • Rechargeable lithium-ion battery and ergonomic design. • Simple one-button operation, ideal even for beginners. • Can be used both with cable and wirelessly.