Zhengzhou, where sold or made-to-order [power regulator power]? Where? The and telephone Tel :0371 -55,676,313 I custom high-power DC power supply, kV voltage - 1000V 2000V, as long as you need, I can give you customized linear regulator power switch DC power power two delivery 3 - 5 days, you need to remember to tell us that oh! Zhengzhou the Emi Instrument Co., Ltd. Contact: Gujingli Tel :0371 -55,676,313 Business QQ: 2417674438 Address: Zhengzhou City, West Street, South Street intersection (south of the main entrance of Tube City Committee meters) Website: www.hm5117.cn