Dr Pen Ultima M8 Professional Skin Care ToolsIt equiped a digital LED display to show you which speed you're working on (6 speed levels) and has a BUILT IN battery, just charge and GO, or use wired with the power cord provided. The Dr. Pen M8 will help with the appearance of skin, giving you a smoother look and feel, resulting in overall beautiful skin.Needle Type:11/16/24/36/NanoFeature1. Digital display:Visual speed, more intuitive operation and accurate selection;2. One-click operation:One-handed control switches and 6 speeds, more quick and easy;3. Dr pen M8 Suitable micro needle is configured with 11 pins, 16 pins, 24 pins, 36 pins, 42 pins, nano pinsfor different body parts;4. Bayonet disign:Upgrded 3 slots,more stable;5. Precision scale:Adjustable needle length for different skin problems;6. Longer battery life:Equipped with 500mAh high-capacity battery,longer working hours; 7. High-performance motors:Equipped with high-performance motor, strong power and more silence;