Adesso AKB-420UB Leaflet

ADESSO provides a limited warranty 
against defects in materials and 

workmanship for a period of ONE YEAR 

from the date of original retail purchase. 

If you discover a defect, Adesso will, at its 

option, repair or replace the product at no 

charge to you, provided you return it 

during the warranty period with 

transportation charges pre-paid to Adesso.  

You must contact Adesso at 

Merchandise Authorization number (RMA) 

prior to returning any product.  For each 

product returned for warranty service, 

please include your name, shipping 

address (no P.O. Box), telephone number, 
copy of the bill of sale as proof of 

purchase and have the package clearly 

marked with your RMA number.

 

This warranty does not apply if the 
product has been damaged by accident, 

abuse, misuse or improper freight 

handling.   The warranty will not cover 

products that have been modified without 

the written permission of Adesso, or if the 

serial number has been removed or 
defaced.

 

 

Long-term repetitive use of any keyboard 
could cause injury to user.  Adesso 

recommends users avoid excessive use of 

this or any keyboard. 

We have listed most of our 

FAQ’s (Frequently Asked Questions) at: 

 

Please visit our FAQ Service & Support 
pages before you contact our E-mail or 

Telephone Support. 

 

 

If our FAQ’s do not help you resolve your 

issues, please email 

  

 

Toll Free: (800) 467-1195 

9:00AM to 6:00PM PST Monday - Friday. 

 

 
Adesso is a trademark of Adesso Inc.  All other 
trademarks and trade names are property of 
their respective holders.