Dr pen ultima A1 professional six speed auto derma pen has PMU and MTS functions, wired power, metal shell material, 110~220V 50/60Hz input, 5V 1000mA output, 0.25mm / 0.5mm / 0.75mm / 1.0mm / 2.0mm / 1.5mm / 2.5mm / 3.0mm needle adjustment, automatic high speed roll, producing twelve delivery channels, various micro-needle mode to stimulate skin, five different high speed, micro-needle adjustable length.