This manual introduces the operation methods of the Leland Legacy pump, including the pump's switch, entering or canceling settings, setting selection, resetting running data, sampling time setting, program setting, delayed start setting, pump flow setting, calibration, sampling, data scroll key selection, resetting running time, deleting programs or delayed start, deleting sampling time, flow failure, battery operation, battery pack installation, battery status, low battery failure, battery charging, charging status, removing and replacing battery packs, using PC to program the pump, etc.