This is a retro mobile phone receiver that allows you to be more comfortable when answering calls. More suitable for people who communicate on the phone for a long timeThe Telephone Handset has 3.5mm Round Socket;Handset Size:21*5*6cm/8.26*1.96*2.36"(L*W*H) ;Cable length :1M/3.28FTYou can adjust it according to your needs, with a 1-meter extension cable, you can easily answer callsWhen there is a call on the mobile phone, use the Telephone Handset plug to point the hand socketOnly works with 3-channel 3.5mm audio socket,before purchasing, please confirm the size of plug.