Please feel free to contact us if you have any questions, concerns, or are interested in our technology. We are open Monday through Friday, from 7:30 a.m. to 4:30 p.m., Pacific Standard Time.
(916) 550-5380 Phone
(916) 550-5342 Fax
1170 National Dr. Ste. 70 Sacramento, CA 95834
Email Dr. Chang Yul Cha at ccha@chacorporation.com.