The Hemisphere S631 / S321+ / S321 power cable is the answer for those who need to work longer. Simply attach your GNSS receiver to a 12 V base battery kit and survey with the rover all day long without having to worry about the base. There is no need to stop working and return to the base in order to check how much power is left in the base batteries. This is the solution for those looking for ease of mind. Simply plug the 5 pin power cable into the receiver and the trailer plug adapter into any battery system and start surveying without worry. This is the solution for those looking to save time and money. Stop wasting time and start surveying more today.