diff --git a/tools/esp8266/User_Manual.md b/tools/esp8266/User_Manual.md
index 60e58d23..8d743b21 100644
--- a/tools/esp8266/User_Manual.md
+++ b/tools/esp8266/User_Manual.md
@@ -138,6 +138,6 @@ Gather user inverter information here to understand what differs between some in
 | -----------------| ----------- | ----------- | ----------- | ----------- | ----------- | -------- | -------- |
 | DanielR92        | HM-1500     |  10016.000  | 2021.000    | 1012.000    | 100.000     |          |          |
 | isdor            | HM-300      | 10014.000   | 2021.000    | 1209.000    | 102.000     |          |          |
-| aschiffler       | HM-???      | 10012.000   | 2020.000    | 624.000     | 100.000     |          |          |
+| aschiffler       | HM-1500     | 10012.000   | 2020.000    | 624.000     | 100.000     |          |          |
 | klahus1          | HM-300      | 10010.000   | 2020.000    | 707.000     | 102.000     |          |          |
 | eeprom23         | HM-1200     | 1.0.16      | 2021(-10-12) | 10-12      | 269619207   | 17:06:00 | HWRev 256 |