Mobile Power Pack jumpstart of Varo. This part is worth the money, it has enough power for my tractor diesel with a capacity 2.8 liters, the battery was empty, connected the Mobile jumper, wait two minutes then start and finished very well. The cables are short, the accessories for air pumps you have to Find, on the side is a flap to open, the compressor is noisy, the description (manual) is very short. I would part again Purchase. Today on 06.02.2013 Have the Power Pack for the second time Bought. The first has held no charge. The reason was probably the rare to recharge. I have also looked for other devices in the same way, the true but not as cheap or had to save a very small battery to power. Now that the new PowerPack hope for more than holds three years.