all necessary components except hydr. power pack and work cylinder are included in delivery. for operation only a regular 110v/60hz or 220v/50hz power source is needed. the lcd measuring system works on a permanent batter......all necessary components except hydr. power pack and work cylinder are included in delivery. for operation only a regular 110v/60hz or 220v/50hz power source is needed. the lcd measuring system works on a permanent battery basis. possible hydr. power packs: ha1 es, ha3 and ha4.