Shenzhen HRD Science & Technology Co., Ltd. is a large  high professional UPS manufacturer,with ISO 9001:2008 and ISO 14001:2004 certified. from Shenzhen China .  HRD UPS is committed to providing highest quality products and thoughtful services to meet  middle and high-end  customers' requirements.  Based on the most advanced and the stalest technique guarantee system, HRD provides the following products and custom made product  for global customer:  Our UPS range from 600va to 400kva ,details as below:   1 Power Master series Online HF UPS 1-3kva, (110/120/ ... more