Wooliis Electronic Devices Co., Ltd. is located in Guangzhou, was founded in 2010. Is a Holzer sensor in the field, set Holzer current sensor, ammeter, voltmeter development, production, sales as one of the high-tech enterprises. Dedicated to provide the market with the best, most convenient, the most concise, most user-friendly, high reliability of Holzer current sensors and instrumentation. Customer satisfaction is our company's continuous pursuit and motivation of all staff. Each of our products have been tested by professional testing equipment, strict testing, to ensure the quality of each product consistent perfect stability is our company's continuous pursuit. Each instrument is calibrated by our professional equipment to ensure that each instrument is always absolutely accurate. All the staff of our company have been working hard to provide customers with perfect products. We have been trying to make our products more stable, more accurate and more perfect. We look forward to working with you.