Features: ADJUSTABLE NEEDLE LENGTH: By turning the rotary dial, you can freely choose the needle length according to your actual needs. CORDLESS OPERATION: The microneedler pen is rechargeable, supporting quick charge and having ultra long standby time. Very easy to use at home or carry around. ENHANCED SPEED SETTINGS: Considering individual differences in skin conditions and sections, The electric microneeding pen upgraded its motor power and optimized its 6 working speed settings from weak to strong. PROFESSIONAL CARTRIDGES: cartridges adopt individual aseptic packaging for disposable use, with no need for extra sterilization. After massive research, the most practical 16 pins, 36 pins, 42pins and painless nano needling are included for you.(6 Pcs 16-Pin+6 Pcs 36-Pin+6 Pcs 42-Pin+2 Pcs Nano). 2 YEAR REPLACEMENT POLICY – Use best professional tools to promote beautiful, healthy skin, in the comfort of your home.At Sergand, we care about your experience with our products. We provide a 2-year product exchange policy, if you are not satisfied in any way when using our products, we promise to replace you with a new microneedler pen.