diff --git a/app/src/main/java/com/yinuo/safetywatcher/watcher/port/GasUtilss.kt b/app/src/main/java/com/yinuo/safetywatcher/watcher/port/GasUtilss.kt
index e58d635..7d2d44c 100644
--- a/app/src/main/java/com/yinuo/safetywatcher/watcher/port/GasUtilss.kt
+++ b/app/src/main/java/com/yinuo/safetywatcher/watcher/port/GasUtilss.kt
@@ -114,7 +114,7 @@ fun getGasHighThreshold(gasType: String, unit: String): Float {
 fun getLocalGasUnit(gasType: String): String {
     return when (gasType.uppercase()) {
         O2 -> UNIT_VOL
-        VOCS -> UNIT_VOL // TODO
+        VOCS -> UNIT_MGM3 // TODO
         CO, CH4, H2S, H2, NH3, S02, CL2, NO2, NO, HF, C02 -> getDefaultUnit(gasType)
         else -> ""
     }