SONGTANGTech. Inc. is a branch of GLOSO Tech. Inc. located in Hangzhou, China. Registered in 2016, is a IATF16949 and ISO9001 certified manufacturer of quality switches and circuit protection products, and a true leader in the low-voltage and overload voltage application market. We design, manufacture and assemble in-house backed by the best R&D, Production and Engineering teams in the industry. Our products meet the safety standards of UL, ISO, SAE, TUV, RoHS, and ENEC. With three sales offices in Taiwan, two sales centers and two factories in China, Gloso is your best solution for the circuit protection!