OMRON's basal thermometer is perfect for health management, with accurate basal body temperature measurement and a convenient case. - Brand: OMRON - Model Name: basal - Included Items: Case, replacement sensor - Color: White It works without any problems, but it seems like the battery needs to be replaced. It comes with a convenient ring to prevent slippage. I will disinfect it with alcohol before sending it. Thank you for looking. Basal Body Thermometer