diff --git a/commons/connector/fitbit/fitbit_intraday_spo2.avsc b/commons/connector/fitbit/fitbit_intraday_spo2.avsc
new file mode 100644
index 00000000..c9e8fd8a
--- /dev/null
+++ b/commons/connector/fitbit/fitbit_intraday_spo2.avsc
@@ -0,0 +1,11 @@
+{
+  "namespace": "org.radarcns.connector.fitbit",
+  "type": "record",
+  "name": "FitbitIntradaySpo2",
+  "doc": "Intra day spo2 data from fitbit device.",
+  "fields": [
+    { "name": "time", "type": "double", "doc": "Device timestamp in UTC (s)." },
+    { "name": "timeReceived", "type": "double", "doc": "Time that the data was received from the Fitbit API (seconds since the Unix Epoch)." },
+    { "name": "spo2", "type": "float", "doc": "Percentage value of SpO2 in the bloodstream. SpO2 data is collected when the user is in an extended period of sleep (at least 3 hours of quality sleep). Spo2 values are calculated on a 5-minute exponentially-moving average and provided at the end of a period of sleep."}
+  ]
+}
diff --git a/specifications/connector/radar-fitbit-connector.yml b/specifications/connector/radar-fitbit-connector.yml
index 3825f4e0..cebb0835 100644
--- a/specifications/connector/radar-fitbit-connector.yml
+++ b/specifications/connector/radar-fitbit-connector.yml
@@ -37,3 +37,6 @@ data:
   - doc: Skin temperature
     topic: connect_fitbit_skin_temperature
     value_schema: .connector.fitbit.FitbitSkinTemperature
+  - doc: Spo2 or Blood oxygen saturation
+    topic: connect_fitbit_intraday_spo2
+    value_schema: .connector.fitbit.FitbitIntradaySpo2
\ No newline at end of file