They operate all days of the year from their main base just outside of Reykjavík and during the summer they also offer tours from Geysir area, Thorsmork, Landmannalaugar area and anywhere you want to go. They custom make longer tours through the highlands, lowlands and right across the country for as long as you want.
The fleet consists of 30 + buggies waiting for you. They have all the gear you need from helmet, boots, gloves, bandanas and balaclavas. What you need is a valid driving license to drive and you are good to go.