The Tempdrop Fertility Monitor & Basal Body Temperature Tracker is a digital device designed specifically for tracking fertility. It includes a monitor, armband for wearing to track temperature, and a storage bag for easy portability. The device is smartphone compatible, making it convenient to track and monitor fertility data on the go. With the Tempdrop brand known for accuracy and reliability, this pre-owned product offers a cost-effective solution for those looking to monitor their fertility and basal body temperature. it is technically pre-owned but only opened and never used. may have stains, discolor due to it being opened.