Shenzhen Vanguard electronic company is founed in 2002 ,and We are a professional manufacturer of automatic voltage regulators (AVR). our company is located in Shenzhen China,very near from Guangzhou,and the famours of Huaqianbei,SEG market! welcome to Shenzhen,welcome to Vanguard! Our rules are: Quality First, Customers First, and Credibility First! We have been trying our best to meet customers' requirements. More and more customers, manufacturers and suppliers have established good relationships with us.