The Hobart 500535 Handler 140 bonus kit comes with a welder, welding helmet and a cart that can be used to transport the Handler 140. The Handler 140 is capable of welding 24 gauge up to 1/4 inch in different materials like steel or stainless, flux cored and aluminum. The wire feeder quickly releases the wire with a drive roll lever, making it easier for the user to pull out that extra wire required to weld a material at a distance from the welding unit. The built-in gas valve eliminates the need of external supply of shielding gas thus making the unit ready to use, straight out of the box. The Handler 140 works on 115-volt standard household current; this implies you need not make arrangements for additional power supply to get this welding tool running when you are using it at home. In case you are not operating the mig welder and it is left ON the contactor makes the wire electrically "cold" thus providing operational safety. In case of thermal overload the motor resets itself automatically thus providing internal protection enhancing the longevity of this unit. The 770432 Welding Helmet enjoys dual power input; solar powered lens and non-replaceable lithium battery. The lens darkens in 1/3600 of a second and benefits the user by providing fast darkening response while in use. 2 independent arc sensors continuously sense the arc and enhance the darkening response. The cart is used to store a small cylinder and has a tray to store away the cables, keeping the job site clean and free from cables to avoid accidental tripping.