LIFT OFF THE TOP LID TO REVEAL THE battery compartment.
insert 4x fresh AAA batteries.
slide the orange power-switch on the top right to power on the unit.
when switched on, the led screen will light up immediately.
you can also power the unit with a standard usb-c cable (5V / min 1A). we recommend using a quality 'USB-IF' compliant cable.
keep your Medieval up-to-date with the latest firmware by going to the update utility.