Knapsack electro-hydraulic rescue tool set consists of hydraulic electric pump (including battery, hydraulic hose), cutter, expander, door opener, accessories (including charger, manual, operation CD-ROM), spare parts (including 1 spare battery, 1 spare hydraulic hose) and carrying equipment.The hydraulic electric pump is the power source of the tool set, and the shears, expanders, and door openers all need to be used in conjunction with it.