I am selling the main body of the "Watashi no Ondo" basal body temperature thermometer (thermometer for women), which can measure basal body temperature just by wearing it on your bra while sleeping. I used it while trying to conceive, and it was very easy because I didn't have to wake up at a specific time to take my temperature, and it was automatically graphed in the app! I was able to conceive, so I will pass it on to someone who can use it ^ ^ * The package, instructions, cable, etc. are all included! * I was using a different cable, so this one is unused. * Bluetooth connection and app linking have been confirmed. The following is a quote from the official website. [Just wear it to sleep] Watashi no Ondo Women's Basal Body Temperature Thermometer for trying to conceive [Measures during sleep, automatically records in the app, no input required, permanent data storage] (Device body) Just wear it and sleep. A new habit device that automatically measures the unique rhythm of women while they sleep. ■ Just wear it and sleep. You can understand your own rhythm without any effort. What is important for managing women's health, such as trying to conceive, premenstrual discomfort, and menopause, is to "know" the rhythm of the high-temperature phase and the low-temperature phase. "Watashi no Ondo®" is a device that you simply attach to the dedicated night bra and sleep in, so you can continue measuring without any effort. By being able to understand your own rhythm more specifically, you can use it for your daily health management. Also, the battery lasts for about 2-3 weeks without charging.