Edan Instruments, Inc. engages in the research, development, manufacture, and service of medical electronic equipment and in vitro diagnostic products in China and internationally. The company offers ECG products, including resting ECG, stress test, holter, wireless solution, and ECG workstation products; patient monitoring systems, such as modular and compact patient monitor, vital signs, and telemetry and IT products; and obstetrics and gynecology products comprising fetal and maternal monitoring systems, fetal telemetry systems, ultrasonic doppler systems, central monitoring systems, video colposcopes, and biofeedback and stimulation systems. It also provides ultrasound systems that include cart-based color doppler, portable color doppler, and B/W ultrasound systems; and in-vitro diagnostics, which comprise hematology analyzers and reagents.