Exhibit 16.1

​

​

​

​

​	​
​	RSM US LLP
​	​
​	2811 Ponce de Leon Blvd
February 14, 2025	Suite 820
​	Coral Gables, FL 33134
​	​
Securities and Exchange Commission	T +1 305 446 0114
Washington, D.C. 20549	F +1 305 442 7478
​	​
​	www.rsmus.com
Commissioners:	​
​	​
We have read CSP Inc’s statements included under Item 4.01 of its Form 8-K filed on February 14, 2025 and we agree with such statements concerning our firm.

​