1. Best service 2. Realiable supplier 3. Superior product 4. Function test, RoHS, UL Welcome to Hangzhou Singo Tech Co.,ltd!Hangzhou Singo Tech Co. Ltd, located in Hangzhou, Zhejiang province, China, which founded in 2000.We focus on PCBAdesign, manufacture and PCB assembly,OEM/ODM services.High-efficient mode of operation communication -confirmation- research & development - testing –sample ...