Bluetooth Professional weather station W820 Internal temperature range: -50...+70 °C Outside humidity range: 20...95 % Outside temperature range: -50...+70 °C Included in delivery: 1 x indoor weather station / 1 x outdoor sensor / 1 x manual / 1 x mounting pipe Batteries: 4 x AA / 3 x AA Functions: Radio Clock / Calendar / Weather Forecast / Air Pressure / Temperature Indoors / Temperature Outdoors (Wireless) / Humidity Indoors / Humidity Outdoors (Wireless) / Wind Measuring (Wireless) / Rain Measuring (Wireless)