LG Electronicsuser manual Wireless Terminal GDC-400H
Page 23
3.Setting Up
3.5 Wireless Terminal (GDC-400H)
Rubber lid for ear-microphone
♣ A general ear-microphone can be used.
Warning
Do not insert any external substance except ear-microphone for GDC-400H in the hole. Inserting anything except for ear-microphone provided by general maker may cause severe damage to the terminal.