Edan Instruments, Inc. engages in the design, manufacture, research and development, and sale of medical equipment. Its products include fetal monitors & dopplers, electrocardiographs, patient monitors, ultrasound, and transcranial dopplers. The company was founded by Hao Zheng and Xi Cheng Xie on August 2, 1995 and is headquartered in Shenzhen, China.