diff --git a/stapi_fastapi_tle/backend.py b/stapi_fastapi_tle/backend.py
index d51e3d4..f2aecb1 100644
--- a/stapi_fastapi_tle/backend.py
+++ b/stapi_fastapi_tle/backend.py
@@ -92,8 +92,8 @@ async def search_opportunities(
         except IndexError:
             alt = 0
         passes = self.satellite.passes(
-            start=validated.properties.datetime[0],
-            end=validated.properties.datetime[1],
+            start=validated.datetime[0],
+            end=validated.datetime[1],
             lon=validated.geometry.coordinates[0],
             lat=validated.geometry.coordinates[1],
             alt=alt,
diff --git a/stapi_fastapi_tle/models.py b/stapi_fastapi_tle/models.py
index 9c8be55..4308708 100644
--- a/stapi_fastapi_tle/models.py
+++ b/stapi_fastapi_tle/models.py
@@ -11,7 +11,7 @@
 )
 
 from stapi_fastapi.models.constraints import Constraints as BaseConstraints
-from stapi_fastapi.models.opportunity import OpportunityRequest
+from stapi_fastapi.models.opportunity import OpportunityRequest, OpportunityProperties
 
 
 class Satellite(BaseModel):
@@ -33,10 +33,7 @@ def tle_lines(self) -> tuple[str, str, str]:
         return self.tle.split("\n")
 
 
-class PassProperties(BaseModel):
-    datetime: AwareDatetime
-    start: AwareDatetime
-    end: AwareDatetime
+class PassProperties(OpportunityProperties):
     view_off_nadir: float = Field(..., alias="view:off_nadir")
     view_azimuth: float = Field(..., alias="view:azimuth")
     view_elevation: float = Field(..., alias="view:elevation")
diff --git a/stapi_fastapi_tle/satellite.py b/stapi_fastapi_tle/satellite.py
index 579d272..afbfdb4 100644
--- a/stapi_fastapi_tle/satellite.py
+++ b/stapi_fastapi_tle/satellite.py
@@ -59,7 +59,10 @@ def passes(
                         bbox=[lon, lat, alt, lon, lat, alt],
                     ),
                     properties={
-                        "datetime": t.utc_datetime(),
+                        "datetime": [
+                            t.utc_datetime() - self._model.block_time[0], 
+                            t.utc_datetime() + self._model.block_time[1]
+                        ],
                         "start": t.utc_datetime() - self._model.block_time[0],
                         "end": t.utc_datetime() + self._model.block_time[1],
                         "view:off_nadir": off_nadir,
@@ -67,6 +70,7 @@ def passes(
                         "view:elevation": elevation.degrees,
                         "sun:elevation": 0,
                         "sun:azimuth": 0,
+                        "product_id": "mock:standard",
                     },
                 )
             )