diff --git a/route/api/wristband.js b/route/api/wristband.js
index 952dc53..41acfa6 100644
--- a/route/api/wristband.js
+++ b/route/api/wristband.js
@@ -131,8 +131,9 @@ router
         let query = "select w.`name`, w.`mac` as wristband, \
             coalesce(l.`name`, l2.`name`) as locname, \
             coalesce(case when tmp2.`wlocrtloc` = 'NG' then null else tmp2.`wlocrtloc` end, ll.`devid`) as locid, \
-            ll.*\
-            from ??.?? w\
+            case when tmp2.`wlocrtloc` = 'NG' then 1 else 0 end as loss, \
+            ll.* \
+            from ??.?? w \
             left join ??.?? tmp2 \
             on tmp2.`wlocrtmac` = w.`mac` \
             left join ??.?? ll \
diff --git a/src/components/AdminPage/Wristband/LocStatus/ListItem.js b/src/components/AdminPage/Wristband/LocStatus/ListItem.js
index 5744dd9..57b4e83 100644
--- a/src/components/AdminPage/Wristband/LocStatus/ListItem.js
+++ b/src/components/AdminPage/Wristband/LocStatus/ListItem.js
@@ -5,7 +5,7 @@ import {convertTime, padding} from '../../../../tools';
 const ListItem = ({i18n, data}) => {
 
     return (
-        <Table.Row style={{color: padding(data.timestamp, 13, 1, '0') < (Date.now() - 60000) ? '#f00' : 'inherit'}}>
+        <Table.Row style={{color: data.loss != 0 ? '#f00' : 'inherit'}}>
             <Table.Cell>{data.wristband}</Table.Cell>
             <Table.Cell>{data.name}</Table.Cell>
             <Table.Cell>{data.locname}</Table.Cell>
diff --git a/src/components/AdminPage/Wristband/LocStatusWloc/index.js b/src/components/AdminPage/Wristband/LocStatusWloc/index.js
index c7478c3..c08ccb3 100644
--- a/src/components/AdminPage/Wristband/LocStatusWloc/index.js
+++ b/src/components/AdminPage/Wristband/LocStatusWloc/index.js
@@ -94,7 +94,7 @@ class LocStatusWloc extends React.Component {
                                         {
                                             t.list ? 
                                             t.list.map((tt, idx) => {
-                                                let isExpire = padding(tt.timestamp, 13, 1, '0') < (Date.now() - 60000) ? true : false;
+                                                let isExpire = tt.loss == 1 ? true : false;
                                                 return (<List.Item key={idx}>
                                                     {
                                                         tt.name ? (