The upper right button is pressed to start/stop the chronograph function. The lower right button is pressed to reset after the chronograph function has been stopped. In the middle is the crown, which can be hand-wound to add power and pulled out to adjust the time. The movement has a hacking function to stop the secondhand while adjusting the time.
This 4801 automatic chronograph works very well at a high vibration of 28800 per hour. Alternatively, you may switch to a 4130 movement at an additional cost.
