1. How do you set this thing? By DorothyHold the 'Mode' button down until the hour, minute or date comes up (which ever you want to set), then push the 'Set' button to set the hour that you want. Then push the 'Mode' button again to move to the minute and push 'Set' until you get the minute you want. Then push 'Mode' to change the month and date and then push 'Mode' again to display the time.
2. What type of batteries does it take? By EzraBatteries are included, replacement is a LR44 button.