diff --git a/src/W800_SDK_v1.00.10/app/app_drivers/i2c/BMP280.h b/src/W800_SDK_v1.00.10/app/app_drivers/i2c/BMP280.h
index e274ecc..d5cba9e 100644
--- a/src/W800_SDK_v1.00.10/app/app_drivers/i2c/BMP280.h
+++ b/src/W800_SDK_v1.00.10/app/app_drivers/i2c/BMP280.h
@@ -98,11 +98,11 @@ float BMP280_get_temperature(void);
 float BMP280_get_pressure(float * const temperature);
 
 /**
- * @brief Returns an approximation of the altitude using the measured atmospheric pressure.
+ * @brief Returns an approximation of the altitude in meters using the measured atmospheric pressure.
  * 
  * @param pressureAtSeeLevel the current atmospheric pressure at see level in hPa. Can be 0 if unknown and a default value of 1013.25 hPa will be used.
- * @param pressure the address of a float which will contain the measured pressure. If not needed, can be NULL.
- * @param temperature the address of a float which will contain the measured temperature. If not needed, can be NULL.
+ * @param pressure the address of a float which will contain the measured pressure in Pa. If not needed, can be NULL.
+ * @param temperature the address of a float which will contain the measured temperature in °C. If not needed, can be NULL.
  * @return float the altitude in meters
  */
 float BMP280_get_altitude(float pressureAtSeeLevel, float * const pressure, float * const temperature);