The compact, lightweight device is durable, waterproof, and features an easy-to-read display * For Oral, Rectal, or Under Arm Use * Large Digital Display * Last Memory Recall * Beeps when ready * Measuring Range 90°F ~ 109.9°F * Accuracy ± 0.2°F (95.9°F ~ 107.6°F) / ± 0.4°F (< 95.9°F or > 107.6°F) * Power Supply: One Button Battery: 1.5V LR41, AG3 or equivalent * Weight / Dimensions~12 g / 12.2 cm x 1.9 cm x 1 cm * Ambient Operating Temperature: 60.8°F ~ 104°F *