diff --git a/hardware/physical-web/physical-web.html b/hardware/physical-web/physical-web.html
index 4cb548b3..ff5ea95b 100644
--- a/hardware/physical-web/physical-web.html
+++ b/hardware/physical-web/physical-web.html
@@ -218,7 +218,7 @@
 
             $("#node-input-period").spinner({min:0});
             $("#node-input-count").spinner({min:0});
-            $("#node-input-power").spinner({min:-30,max:100});
+            $("#node-input-power").spinner({min:-100,max:20});
             $("#url-length").text(checkLength($('#node-input-url').val()));
             $("#node-input-mode").on("change",function() {
               if ($("#node-input-mode").val() === "uid") {