AC 1 is a battery powered water computer that attaches to an outside tap. It is supplied with three tap adaptors to enable connection to any outside tap (1\", 3/4\", 1/2\" BSP). The AC 1 is programmed using a dial, this allows the user to select one of 13 pre set programmes. Allows watering cycles from 4 times per day to once per week. The AC range uses 2 x C Type batteries and these typically last for 12 months. The water flow is controlled using a ball valve. The AC range has a 2 year guarantee.