Karcher K3 waterblaster
A very powerful little unit. Comes with two wands, one high power, the other variable so you can reduce power as required. There is a soap canister for adding soap when required for a really dirty job.
I also have a deck cleaning attachment available separately, see my other listings. That makes cleaning decks and driveways a lot faster/easier as well as avoiding the risk of damage to soft wood from the normal wand.
Note that all of these smaller electric waterblasters are air cooled and should only be used for smaller jobs. If you need to waterblast your house for example, then a larger petrol model with water cooling is more appropriate.