diff --git a/examples/fitness_machine_service_example.py b/examples/fitness_machine_service_example.py
index 1aac03d..6d39bf3 100644
--- a/examples/fitness_machine_service_example.py
+++ b/examples/fitness_machine_service_example.py
@@ -95,7 +95,7 @@ def print_control_point_response(message):
         power_level = 4 / 100 * max_power
         print(f"Increasing target power to 4 percent of maximum power ({power_level}W).")
         print("The trainer will automatically adjust resistance based on your leg speed.")
-        print("Try pedaling above {power_level}W to feel decreasing resistance, and vice versa.")
+        print(f"Try pedaling above {power_level}W to feel decreasing resistance, and vice versa.")
         await ftms.set_target_power(power_level)
 
         await asyncio.sleep(30)
diff --git a/pycycling/fitness_machine_service.py b/pycycling/fitness_machine_service.py
index 4e484dd..3c91b3f 100644
--- a/pycycling/fitness_machine_service.py
+++ b/pycycling/fitness_machine_service.py
@@ -46,7 +46,7 @@
 # notify: Indoor Bike Data
 ftms_indoor_bike_data_characteristic_id = "00002ad2-0000-1000-8000-00805f9b34fb"
 # notify: Fitness Machine Status
-ftms_fitness_machine_status_characteristic_id = "00002ad3-0000-1000-8000-00805f9b34fb"
+ftms_fitness_machine_status_characteristic_id = "00002ada-0000-1000-8000-00805f9b34fb"
 # notify: Training Status
 ftms_training_status_characteristic_id = "00002ad3-0000-1000-8000-00805f9b34fb"
 # (write, indicate): Fitness Machine Control Point