Omron MC-EP2-E Disposable Probe Cover is compatible with Omron Gentle Temp Ear Thermometer 520, Omron Gentle Temp Ear Thermometer 521 and Omron Gentle Temp Ear Thermometer 522. It is a single use disposable cover that fits easily and is easy to remove and provides accurate and more hygienic body temperature monitoring. It forms a barrier between ear and ear thermometer and avoids the ear thermometer sensor getting clogged from dirt or ear wax. If the sensor gets blocked with ear wax it might lead to inaccuracy. Probe covers prevent cross contamination and users can easily assure the probe cover is attached, and the appliance is ready to use. The well-designed heat insulation probe can ensure accurate, consistent reading and short intervals between each measurement.