diff --git a/cards/WifiSetCard.vue b/cards/WifiSetCard.vue
index 6e5aac0..247d963 100644
--- a/cards/WifiSetCard.vue
+++ b/cards/WifiSetCard.vue
@@ -11,7 +11,7 @@
           <q-btn color="primary" label="Scan WiFi" @click="OpenScanDialog()"></q-btn>
           <q-select v-model="wifimodestr" :options="wifimodes" :map-options="true" :emit-value="true"
             label="WiFi mode"></q-select>
-          <q-input v-model="wifipwr" label="Max power, dBm" />
+          <q-input type="number" v-model="wifipwr" label="Max power, dBm" />
           <q-input v-model="data.wifi_ap_ssid" label="WiFi network name(AP):" />
           <q-input type="password" v-model="data.wifi_ap_key" label="WiFi network key(AP):" />
           <q-input v-model="data.wifi_ap_ip" label="IP address(AP):" />
diff --git a/helpers.js b/helpers.js
index 54ab76f..44843ca 100644
--- a/helpers.js
+++ b/helpers.js
@@ -2,10 +2,10 @@ import { Dialog } from "quasar";
 
 function secondsToHms(d) {
   d = Number(d);
-  var dd = Math.floor(d / 86400);
-  var h = Math.floor(d % 86400 / 3600);
-  var m = Math.floor(d % 3600 / 60);
-  var s = Math.floor(d % 3600 % 60);
+  let dd = Math.floor(d / 86400);
+  let h = Math.floor(d % 86400 / 3600);
+  let m = Math.floor(d % 3600 / 60);
+  let s = Math.floor(d % 3600 % 60);
   return (' ' + dd + 'd ' + (h < 10 ? "0" : "") + h + ":" + (m < 10 ? "0" : "") + m + ":" + (s < 10 ? "0" : "") + s);
 }