Cisco Meraki MS225 Series Setup Instruction page 4

There is a Restore button available on the front panel. Insert a paper clip if a restore is required:
- To delete a downloaded configuration and reboot: brief, momentary press.
- To force the unit into a full factory restore: press and hold for more than 10 seconds.
MS225-24-HW Back Panel
MS225-24P-HW Back Panel
MS225-48-HW Back Panel
MS225-48LP-HW Back Panel
MS225-48FP-HW Back Panel