RF 433MHz remote multifunction weather station Indoor pressure trend indicator Indoor thermometer (0 °C-+°C) Remote outdoor thermometer (-20 °C-+60 °C) Outdoor hygrometer (20%-95%) Remote outdoor hygrometer (20%-95%) Perpetual calendar Comfortable environment icon Max/Min memory of hygrometer & thermometer Temperature displays in °C/°F Snooze alarm clock Low battery icon Power consumption: 2 x AA