Hello********is half correct there. I'm type 1 and on an insulin pump. The device is attached to you 24/7 with this pump you enter in your bsl plus the total amount of carbs your eating. These pumps are better than the pens. I use to be on pens but since being on the pump I don't have to eat a meal at set times of the day, you don't have to eat every meal, but do need to keep an eye on ur bsl. Things you can't do is take these pumps into baths shower or pool. The pump can be 'suspended' means totally stopped, no insulin going through. 'Turned down' exercise is usually when pump is turned down, you don't get as much insulin when exercise. The pump has a basal rate, 'lantus' works the same way but it's humalog through the pump.