Very easy to use... to start a cycle just turn the pointer knob to the desired time

The MANUFLEX® AB series timer is a manually set, synchronous motor driven timer, adjustable to a selected time range by a large, easy to read set pointer. To operate, turn the set pointer to the required time interval. A load circuit is closed when the pointer is turned from zero. The timer motor drives the pointer back to zero, at which point the load circuit opens. Timer is used where a device is to be turned on, runs a selected time and stops at the end of the time interval.

The AB has a hold position, enabling the load circuit to remain off or remain on without starting the timing motor.