You must go here http://www.dji-innovations.com/compass/submit_rma/ fill in the form and they will send you an email with a code number you must use to identify your envelope or package, you will receive detailed directions on how and where to send your compass module.
I hope this helps.
Regards!
I hope this helps.
Regards!
Mine just came in yesterday, it's the defective GPS. I bought mine from UAVproducts.com but can't seem to find their address to ship it back. They also haven't responded to my emails.. Anyone know where to send it for north america?