diff --git a/grmn/chksum.py b/grmn/chksum.py
index 56f09f9..c2a164c 100644
--- a/grmn/chksum.py
+++ b/grmn/chksum.py
@@ -15,7 +15,7 @@ class ChkSum:
         with open(filename, "rb") as f:
             while True:
                 block = f.read(blocksize)
-                 if len(block) != 0:
+                if len(block) != 0:
                     self.add(block)
                 if print_progress:
                     print(".", end="", flush=True)
diff --git a/grmn/devices.py b/grmn/devices.py
index da6f211..7d67975 100644
--- a/grmn/devices.py
+++ b/grmn/devices.py
@@ -1076,6 +1076,7 @@ DEVICES = {
     3517: "Approach Z82, Sensor Hub",
     3519: "Approach G80 ASIA",
     3526: "Approach Z82",
+    3527: "Approach Z82, Aux",
     3535: "Captain Marvel APAC",
     3536: "First Avenger APAC",
     3537: "Rey APAC",