diff --git a/unilabos/devices/pump_and_valve/runze_multiple_backbone.py b/unilabos/devices/pump_and_valve/runze_multiple_backbone.py
index 36cc414c..72dda67d 100644
--- a/unilabos/devices/pump_and_valve/runze_multiple_backbone.py
+++ b/unilabos/devices/pump_and_valve/runze_multiple_backbone.py
@@ -170,7 +170,7 @@ class RunzeMultiplePump:
                 raise RunzeSyringePumpConnectionError("Connection is closing")
 
             run = "R" if "?" not in command else ""
-            full_command = f"/{address}{command}{run}\r\n"
+            full_command = f"/{address}{command}{run}\r\n"  # \r\n should direct use, not \\r\\n
 
             output = self.send_command(full_command)[3:-3]
         return output