The Ipower Watch goal is to remove the unnecessary external power source and eliminates the long wire at your work station, while providing exceptional power supply output to your tattoo machine. The Ipower watch attaches to your wrist, & with a simple push of the button you can adjust your voltage to 5 different settings: 5-Volt, 6.5-Volt, 8-Volt, 9.5-Volt, & 11-Volt It also includes: (1) Micro USB to 3.5 Female Audio Jack Cord (Cheyenne Products) (1) Micro USB to RCA Male Cord (Machine with RCA Connection) (1) Micro USB to DC 5.5mm Female Plug (Rogue & Toreto Machine) (1) Micro USB to DC 3.5mm Female Plug (Used for 2 Adapters Heads included) (1) Light Cable Adapter Head (Apple Products) (1) Micro USB Adapter Head (Other Cell Phone & Tablet Products) Battery Power Run Time: Cheyenne Motor or Pen: 4-5 hours Rotary Machine: 6-7 Hours (2 Hours to fully charge you IPower Watch) Special Note: Will not work long on a Coil Machine so we suggestion only rotary style machines. Includes 6 month warranty through the manufacture. You will need to contact them and may be responsible for postage to them.