The flexible, comfortable monitor is positioned in your child’s underarm area and wirelessly sends accurate, real-time temperature readings to your smart device. A viral fever can last 4-6 days. With FeverSense, you can track your child’s temperature for up to 7 days on a single charge. If your child’s temperature rises, the connected FeverSense app will alert you, so you can respond immediately. The app is compatible with a variety of iOS and Android™ smart devices, including mobile phones and tablets.