3 Level Adjust Speed This engraving pen can adjust speed from 5000 to 18000 r/min,The highest speed are also working on metal surface.Low noise design allow engraver pen keep quiet while working at high speed.
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Power-off Protection When etching tool encounter great resistance, it will shut off automatically to protect itself to extend using life.Then you just need to press ON/OFF button to start working again.
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USB Power Charging This engraver pen powered by USB interface, it can meet your outdoor using after finishing charging.It can also be used while charging, but we suggest you to use after charging to extent battery using life.
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