Matrix Audio HPA-3B - Manual (Page 10)

Customer Service
9
From the purchase date, we will provide you one-year-limited warranty，
warranty does not cover accessories.
Any fault caused by quality problems during the warranty period, we will
provide free maintenance. The free maintenance do not cover by incorrect
using, negligence, accidental damage and unauthorized modifications or
replace components.
For more information, please visit www.matrix-digi.com.