diff --git a/docs/core/entity/number.md b/docs/core/entity/number.md
index e286e161..ee1c21e4 100644
--- a/docs/core/entity/number.md
+++ b/docs/core/entity/number.md
@@ -44,7 +44,7 @@ If specifying a device class, your number entity will need to also return the co
 | `NumberDeviceClass.DATA_RATE` | bit/s, kbit/s, Mbit/s, Gbit/s, B/s, kB/s, MB/s, GB/s, KiB/s, MiB/s, GiB/s | Data rate
 | `NumberDeviceClass.DATA_SIZE` | bit, kbit, Mbit, Gbit, B, kB, MB, GB, TB, PB, EB, ZB, YB, KiB, MiB, GiB, TiB, PiB, EiB, ZiB, YiB | Data size
 | `NumberDeviceClass.DISTANCE` | km, m, cm, mm, mi, nmi, yd, in | Generic distance
-| `NumberDeviceClass.DURATION` | d, h, min, s, ms | Time period. Should not update only due to time passing. The device or service needs to give a new data point to update.
+| `NumberDeviceClass.DURATION` | d, h, min, s, ms, µs | Time period. Should not update only due to time passing. The device or service needs to give a new data point to update.
 | `NumberDeviceClass.ENERGY` | J, kJ, MJ, GJ, mWh, Wh, kWh, MWh, GWh, TWh, cal, kcal, Mcal, Gcal | Energy, this device class should be used to represent energy consumption, for example an electricity meter. Represents _power_ over _time_. Not to be confused with `power`.
 | `NumberDeviceClass.ENERGY_DISTANCE` | kWh/100km, mi/kWh, km/kWh | Energy per distance, this device class should be used to represent energy consumption by distance, for example the amount of electric energy consumed by an electric car.
 | `NumberDeviceClass.ENERGY_STORAGE` | J, kJ, MJ, GJ, mWh, Wh, kWh, MWh, GWh, TWh, cal, kcal, Mcal, Gcal | Stored energy, this device class should be used to represent stored energy, for example the amount of electric energy currently stored in a battery or the capacity of a battery. Represents _power_ over _time_. Not to be confused with `power`.
diff --git a/docs/core/entity/sensor.md b/docs/core/entity/sensor.md
index b5ad68f5..2e55cf75 100644
--- a/docs/core/entity/sensor.md
+++ b/docs/core/entity/sensor.md
@@ -46,7 +46,7 @@ If specifying a device class, your sensor entity will need to also return the co
 | `SensorDeviceClass.DATA_SIZE` | bit, kbit, Mbit, Gbit, B, kB, MB, GB, TB, PB, EB, ZB, YB, KiB, MiB, GiB, TiB, PiB, EiB, ZiB, YiB | Data size
 | `SensorDeviceClass.DATE` | | Date. Requires `native_value` to be a Python `datetime.date` object, or `None`.
 | `SensorDeviceClass.DISTANCE` | km, m, cm, mm, mi, nmi, yd, in | Generic distance
-| `SensorDeviceClass.DURATION` | d, h, min, s, ms | Time period. Should not update only due to time passing. The device or service needs to give a new data point to update.
+| `SensorDeviceClass.DURATION` | d, h, min, s, ms, µs | Time period. Should not update only due to time passing. The device or service needs to give a new data point to update.
 | `SensorDeviceClass.ENERGY` | J, kJ, MJ, GJ, mWh, Wh, kWh, MWh, GWh, TWh, cal, kcal, Mcal, Gcal | Energy, this device class should be used for sensors representing energy consumption, for example an electricity meter. Represents _power_ over _time_. Not to be confused with `power`.
 | `SensorDeviceClass.ENERGY_DISTANCE` | kWh/100km, mi/kWh, km/kWh | Energy per distance, this device class should be used to represent energy consumption by distance, for example the amount of electric energy consumed by an electric car.
 | `SensorDeviceClass.ENERGY_STORAGE` | J, kJ, MJ, GJ, mWh, Wh, kWh, MWh, GWh, TWh, cal, kcal, Mcal, Gcal | Stored energy, this device class should be used for sensors representing stored energy, for example the amount of electric energy currently stored in a battery or the capacity of a battery. Represents _power_ over _time_. Not to be confused with `power`.