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 *