A tattoo machine is a hand-held equipment used to create tattoos, a permanent mark on the skin. The tattoo is created by introducing ink into the skin with the help of a needle. These advanced equipment can control the depth, speed and force of the needle. This has allowed tattooing to become a professional art form. The modern tattoo equipment use electromagnets and produce reduced noise, strong force and high frequency. These machines use electromagnetic coils to move the armature bar up and down. An armature bar is a group of needle, which pushes ink inside the skin. Today the market offers a wide range of tattoo machines, including Rotary machine, Coil machine, Liner machine, Shader tattoo machine and Color/saturation machine. http://amplify.com/u/a1eiql