3nh provides high-quality comprehensive pre-sale and after-sale service for customers. No matter what requirements customers need, no matter what problems and services customers ask, 3nh customer service center will provide perfect services. Meanwhile, customer service center will classify customer feedbacks. For example, if the problem can be handled by 3nh, 3nh will be responsible for it; if the problem belongs to 3nh authorized service center, 3nh customer service center will contact with the authorized service center to solve customer problems or give the appropriate answer as soon as possible.
 
1.Warranty
 
1> Warranty will be provided in case of the following circumstances. 3nh offers one year free maintenance service.  
 
a. This product is under warranty for 12 months from the purchase date. Customers must provide warranty card and valid proof of purchase.
b. Warranty is only for the failures caused by the quality problem.
 
2> Warranty will not be provided in case of the following circumstances. 3nh can offer paid repair service.  
 
a. Product failure or damage caused by incorrect installation, usage, maintenance and safekeeping .
b. Product model and serial number are inconsistent with the products.
c. No warranty card and valid proof of purchase.
d. Out of warranty, but can continue to be used after being repaired.
e. Damages caused by unauthorized disassembly and maintenance.
f. Damages caused by unexpected factors or human factors.
g. Damages caused by force majeure (such as flood, fire, earthquake, etc.).
* Note: 3nh reserves the final interpretation right to the warranty terms.