diff --git a/custom_components/xiaomi_home/miot/specs/spec_modify.yaml b/custom_components/xiaomi_home/miot/specs/spec_modify.yaml
index f08d890..d144ea7 100644
--- a/custom_components/xiaomi_home/miot/specs/spec_modify.yaml
+++ b/custom_components/xiaomi_home/miot/specs/spec_modify.yaml
@@ -121,11 +121,27 @@ urn:miot-spec-v2:device:outlet:0000A002:chuangmi-212a01:3:
     expr: round(src_value*6/1000000, 3)
 urn:miot-spec-v2:device:outlet:0000A002:chuangmi-212a01:1: urn:miot-spec-v2:device:outlet:0000A002:chuangmi-212a01:3
 urn:miot-spec-v2:device:outlet:0000A002:chuangmi-212a01:2: urn:miot-spec-v2:device:outlet:0000A002:chuangmi-212a01:3
+urn:miot-spec-v2:device:outlet:0000A002:cuco-cp2:2:
+  prop.2.3:
+    expr: round(src_value/10, 1)
+  prop.2.4:
+    unit: mA
+  prop.3.2:
+    expr: round(src_value/10, 1)
+urn:miot-spec-v2:device:outlet:0000A002:cuco-cp2:1: urn:miot-spec-v2:device:outlet:0000A002:cuco-cp2:2
 urn:miot-spec-v2:device:plant-monitor:0000A030:hhcc-v1:1:
-    prop.2.1:
-      name: soil-moisture
-      icon: mdi:watering-can
-    prop.2.2:
-      name: soil-ec
-      icon: mdi:sprout-outline
-      unit: μS/cm
+  prop.2.1:
+    name: soil-moisture
+    icon: mdi:watering-can
+  prop.2.2:
+    name: soil-ec
+    icon: mdi:sprout-outline
+    unit: μS/cm
+urn:miot-spec-v2:device:air-monitor:0000A008:cgllc-s1:1:
+  prop.2.5:
+    name: voc-density
+urn:miot-spec-v2:device:water-purifier:0000A013:roswan-lte01:1:0000D05A:
+  prop.4.1:
+    unit: ppm
+  prop.4.2:
+    unit: ppm
diff --git a/custom_components/xiaomi_home/miot/specs/specv2entity.py b/custom_components/xiaomi_home/miot/specs/specv2entity.py
index 7adbcc6..511dd07 100644
--- a/custom_components/xiaomi_home/miot/specs/specv2entity.py
+++ b/custom_components/xiaomi_home/miot/specs/specv2entity.py
@@ -506,7 +506,11 @@ SPEC_PROP_TRANS_MAP: dict = {
             'entity': 'sensor',
             'state_class': SensorStateClass.MEASUREMENT
         },
-        'voc-density': 'tvoc-density',
+        'voc-density': {
+            'device_class': SensorDeviceClass.VOLATILE_ORGANIC_COMPOUNDS_PARTS,
+            'entity': 'sensor',
+            'state_class': SensorStateClass.MEASUREMENT
+        },
         'battery-level': {
             'device_class': SensorDeviceClass.BATTERY,
             'entity': 'sensor',
diff --git a/custom_components/xiaomi_home/sensor.py b/custom_components/xiaomi_home/sensor.py
index fb9f30b..88cb063 100644
--- a/custom_components/xiaomi_home/sensor.py
+++ b/custom_components/xiaomi_home/sensor.py
@@ -110,7 +110,7 @@ class Sensor(MIoTPropertyEntity, SensorEntity):
                 self._attr_native_unit_of_measurement = list(
                     unit_sets)[0] if unit_sets else None
             # Set suggested precision
-            if spec.format_ in {int, float}:
+            if spec.format_ in {int, float} and spec.expr is None:
                 self._attr_suggested_display_precision = spec.precision
             # Set state_class
             if spec.state_class: