Sena provides the warranty service ONLY through the sales channels where the purchase was made, with an exception of the US and Canada. 
The following is the RMA(Return Merchandise Authorization) procedure according to the RMA address.

North America Region (United States and Canada)
- RMA from the store of purchase: Contact the store of purchase.
- RMA from Sena directly: Contact Sena directly through the link below
  (RMA Request Form)

Other Regions
- Contact the store where you made a purchase.
- If you have difficulty to contact the store of purchase, please contact Sena for support.
  (Contact Support / support@senabluetooth.com)