Proster

Proster is owned by Shenzhen Spark-Tech Technology Co., Ltd., headquartered in China. No. The ultimate owner of Proster, Shenzhen Spark-Tech Technology Co., Ltd., is headquartered in China, not in the United States.

Spark-Tech is a technology-focused manufacturer and exporter based in Shenzhen, China, specializing in digital measurement instruments and consumer electronics accessories.

Distributed via various regional e-commerce storefronts