The Manual Kinetic Generator is a machine added by IndustrialCraft 2, used to generate a small amount of kU. Unlike most machines added by IndustrialCraft 2, it does not have any sort of GUI.
Right-clicking a Manual Kinetic Generator from any side will produce 400kU, which will be emitted at 100kU/t. Right-click and holding will cause the Generator to continuously output 100kU/t. The Generator can hold 1000kU internally, so it will continue to emit power for a few ticks after a player stops clicking it. However, a Manual Kinetic Generator cannot be powered by a player with 6 points of hunger or less (3 shanks, equal to the limit on sprinting).