diff --git a/app/ModelFilters/DeviceWarningFilter.php b/app/ModelFilters/DeviceWarningFilter.php
index 08b698e..7d4301b 100644
--- a/app/ModelFilters/DeviceWarningFilter.php
+++ b/app/ModelFilters/DeviceWarningFilter.php
@@ -15,6 +15,10 @@ class DeviceWarningFilter extends ModelFilter
         return $this->where('device_id', $device);
     }
 
+    public function lv($lv){
+        return $this->where('lv', $lv);
+    }
+
     public function status($status)
     {
         return $this->where('status', $status);