Does anybody have experience with timers on garden hoses? If so, can you direct me to the product?

I don't have the budget to put in a sprinkler system but I wondered if there is such a thing as a timer I could put on my garden hoses. So I could set it to water while I am gone.

My business takes me away for a week at a time, sometimes 2 weeks during the summer. While I do have a friend who promises to stop by and water my plants, he doesn't always remember.

Jenny P