diff --git a/rentals/models.py b/rentals/models.py
index 58938cb..8fc8d8b 100644
--- a/rentals/models.py
+++ b/rentals/models.py
@@ -35,6 +35,11 @@ class LockerUnit(models.Model):
         ]
         ordering = ["index"]
 
+    def __str__(self):
+        last_letter = chr(ord(self.first_letter) + self.columns - 1)
+        last_number = self.first_number + self.columns * self.rows
+        return f"{self.bank.name} (Unit {self.first_letter}{self.first_number}-{last_letter}{last_number})"
+
     def letter_for_column(self, column: int) -> str:
         return chr(column + ord(self.first_letter))