This item was given to me last year, but I haven't used it and have kept it stored in its box, so it's unused. This is a splash-proof clock that can be used in the bathroom. You can check the bathroom temperature with the thermometer. It has a timer and count-up function, which is convenient for letting you know when the bath is ready. Waterproof performance: IPX4 (waterproof protection grade 4) equivalent *Not completely waterproof. Power supply: Uses one button battery (CR2032) (included). Calendar, thermometer, and timer included. Functions: Thermometer/Hygrometer Display type: Digital