diff --git a/exp_legacy/module/locale/en/gui.cfg b/exp_legacy/module/locale/en/gui.cfg
index 31faf20f..798fc158 100644
--- a/exp_legacy/module/locale/en/gui.cfg
+++ b/exp_legacy/module/locale/en/gui.cfg
@@ -305,7 +305,8 @@ cursor-none=You need to hold the blueprint in cursor
 main-tooltip=Production GUI
 label-prod=Production
 label-con=Consumption
-label-bal=Balance (sec)
+label-bal=Balance
+tooltip-per-second=Items per second
 
 [surveillance]
 main-tooltip=Surveillance GUI
diff --git a/exp_legacy/module/locale/zh-CN/gui.cfg b/exp_legacy/module/locale/zh-CN/gui.cfg
index 4af76596..26b60789 100644
--- a/exp_legacy/module/locale/zh-CN/gui.cfg
+++ b/exp_legacy/module/locale/zh-CN/gui.cfg
@@ -305,7 +305,8 @@ cursor-none=您需要將藍圖保持在遊標處
 main-tooltip=製造介面
 label-prod=製造
 label-con=消耗
-label-bal=淨值 (秒)
+label-bal=淨值
+tooltip-per-second=物品每秒
 
 [surveillance]
 main-tooltip=監控介面
diff --git a/exp_legacy/module/locale/zh-TW/gui.cfg b/exp_legacy/module/locale/zh-TW/gui.cfg
index 76864eb7..81996dc5 100644
--- a/exp_legacy/module/locale/zh-TW/gui.cfg
+++ b/exp_legacy/module/locale/zh-TW/gui.cfg
@@ -305,7 +305,8 @@ cursor-none=您需要將藍圖保持在遊標處
 main-tooltip=製造介面
 label-prod=製造
 label-con=消耗
-label-bal=淨值 (秒)
+label-bal=淨值
+tooltip-per-second=物品每秒
 
 [surveillance]
 main-tooltip=監控介面
diff --git a/exp_legacy/module/modules/gui/production.lua b/exp_legacy/module/modules/gui/production.lua
index be359e64..f3261042 100644
--- a/exp_legacy/module/modules/gui/production.lua
+++ b/exp_legacy/module/modules/gui/production.lua
@@ -93,8 +93,11 @@ local production_data_set = Gui.element("production_data_set")
         local disp = Gui.elements.scroll_table(production_set, 320, 4, "disp")
         production_data_group(disp, 0)
         disp["production_0_1"].caption = { "production.label-prod" }
+        disp["production_0_1"].tooltip = { "production.tooltip-per-second" }
         disp["production_0_2"].caption = { "production.label-con" }
+        disp["production_0_2"].tooltip = { "production.tooltip-per-second" }
         disp["production_0_3"].caption = { "production.label-bal" }
+        disp["production_0_3"].tooltip = { "production.tooltip-per-second" }
         for i = 1, 8 do
             production_data_group(disp, i)
         end