The Welch Allyn/Hillrom Pro4000 Ear Thermometer Battery Pack is the genuine replacement power source for the Pro4000 infrared ear thermometer system. Engineered to meet OEM specifications, this battery pack ensures consistent performance and accurate temperature readings in clinical and home healthcare settings. Compatible exclusively with Pro4000 models, it delivers reliable power for continuous operation. Maintain optimal thermometer functionality with this authentic replacement component designed for medical-grade precision and durability.