It is a joint venture, located in Yuyao, Zhejiang, China.  It’s the important OEM production base for Hongfa Groups and Zettler Groups on relays. It was recognized as a high-tech enterprise from year 2010; the "Jintian" brand relay was recognized as a provincial famous trademark.The company's original name was "Ningbo Jintian Relay Co., Ltd.", which was established in August 2000, and renamed "Ningbo Zettler Electronics Co., Ltd." in 2005. It has power relays, solar relays, automotive relays, industrial control relays etc., with more than 500 specifications. The current production capacity has reached 180 million pieces and sales amount is over 350 million yuan.The company covers an area of 30 acres, with an existing plant area of 22,000 square meters, and its products are exported to more than 20 countries and regions including the United States, Germany, and Italy. The main domestic customers of cooperation include Gree, Midea, Haier, Chint, and Huawei; foreign customers mainly include SIG, Emerson, Mars, Siemens, Flextronics, Tahoe, etc.