Welch Allyn Suretemp Plus 690 Thermometer with Oral ProbeThe Welch Allyn Suretemp Plus 690 Electronic Thermometer with Oral Probe is a medical thermometer designed for accurate and quick temperature measurement. It features a large, easy to read LCD display, a durable probe, and an interchangeable oral probe for versatility in measurement. The device has a range of 82. 4F 108F (28. 0C 42. 2C) and a response time of just 4 seconds. It also has a memory function that can store and recall the last temperature