1.Fspr.Luftnach. H. mot.4 EKM (Heer)

The tag or 'Erkennungsmarke' shows overall normal signs of wear. It belonged to a soldier who served in the 1.Fernsprech-Kompanie Luftnachrichten H. motorisier Abteilung 4. This abteilung was formed in late August 1939 and consisted only out of 2 companies. The Abteilung was intended as an interface between the Army (Heer) and the Luftwaffe. During the invasion of Poland it was part of Koluft 10 (Kommandeur der Luftwaffe) under the command of the 10.Armee. During the invasion of the Low Countries it was part of Koluft 16 under the command of the 16.Armee and during the invasion of Russia it was part of Koluft 17 under the command of the 17.Armee. 
In May 1941 the Abteilung was used to form the Luftnachrichten-Abteilung 52 in Luftgau Belgien/Nordfrankreich. In April 1942 it was renamed into Luftnachrichten Regiment 52 and it operated in the St. Pol (France) area. 
The 'H' on the tag means that these detachments were deployed with the air force units etc. subordinate to the army.
The 'O' on both parts of the tag stands for the soldier's bloodtype.