Receive a case of 800 probe covers free with purchase of item 13086!
Welch Allyn/Braun ThermoScan Pro 4000 Specifications: Calibration Accuracy: +/- 0.4°F (0.2°C) at 95.9 - 107.6° F (35.5 - 42.0°C). Response Time: 3-7 seconds. Power Source: Two, 1.5V AA disposable batteries or rechargeable battery pack.