SINGER 4423 Heavy Duty Extra-High Sewing Speed Sewing Machine with Universal Hard Carrying Case Extra-High Sewing Speed of 1,100 stitches per minute gives you professional speed for faster results Heavy Duty Interior Metal Frame ensures that the machine remains still for skip-free sewing Offers safe, dust-free storage of your sewing machine or serger Accommodates almost every model of machine This sewing machine is warranted for use in the US and Canada at 110 volts only.