I bought this when I needed it while I was out, and I only used it once. I have a thermometer at home, so I haven't used it since. As stated on the receipt, the purchase date was four months ago. 10-second prediction Quick-read underarm thermometer DT-701 Includes the main unit, case, packaging box, and instruction manual/warranty. Fast-reading digital thermometer, DT-701, Accuracy ±0.1℃, measuring range 32.0-42.0℃. - Model name: DT-701 - Power supply: LR41 - Country of manufacture: China