Shenzhen HRD Science & Technology Co., Ltd. is a high professional UPS manufacturer with ISO 9001:2008 and ISO 14001:2004 certified power supply manufacturer in Shenzhen China. HRD UPS is committed to providing high quality products and thoughtful services to meet diverse customers\\\' requirements. Our main products include the following: 1) UPS (uninterrupted power supply) 4) inverter(Home inverter, solar inverter, electric inverter, communication inverter) 5) Frequency inverter