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 90øF ~ 109.9øF * Accuracy ñ 0.2øF (95.9øF ~ 107.6øF) / ñ 0.4øF (< 95.9øF or > 107.6øF) * 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: 60.8øF ~ 104øF *