The aircraft serial number is a unique code assigned to a single unit for identification, which guarantees your ownership. You can find it in 2 ways.
Find it on the package box
You can find the EVO or EVO II Aircraft Serial Number of the entire product set, the aircraft, the remote controller and the gimbal respectively on the package box. EVO II aircraft serial number start with "H" and EVO aircraft serial number start with "E". As the picture show below.
Example Picture of EVO II Aircraft Serial Number
Example Picture of EVO Aircraft Serial Number
Find it on your aircraft
The EVO II Aircraft serial number can also be found under the battery of the EVO and inside the battery compartment of the EVO II on the little QR code sticker. As the picture show below.
Directly inside your battery compartment of the aircraft, you will see a QR code with the serial number listed.