A portable generator that can simultaneously output alternating current (AC) and direct current (DC) electrical energy by hand without the need for an external power source, suitable for emergency communication, outdoor operations, disaster relief, STEM teaching, and small medical equipment in areas with power shortages. The combination of planetary gears and needle roller bearings can be operated with one hand. Typical application: providing "last mile" energy for radios, flashlights, and mobile phones; In the wild, data acquisition devices and drone batteries can be recharged; Quickly establish temporary communication nodes in areas without network or electricity; In physics experiments, students can measure the power curve by changing the gear ratio or load.