Mast Nano Rotary Pen MachinePen-style rotary machine for use with needle cartridges. Compatible with all standard power supplies. Machine frame are made from solid rods of high grade aluminum then polished and anodized, laser engraved logo.Machine Specifications:Weight: 82gSize:23mm*78mmWorking Voltage: 5-8VMotor: Coreless motor, 8V/9000RpmNeedle Stroke: 3.2mm
Battery Specifications:Weight: 64gSize:27mm*78mmWorking Voltage: 6-11VBattery Capacity:1200mAh
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I have only used the machine a few times but I am very happy with it.