TOPKING DIGITAL TECHNOLOGY CO.,LTD
Manufacturer and Supplier - China
earphone for Iphone 4 (TP-103)
Earphone can be with or without microphone and volume control
It can be used for Iphone 4,3GS,IPod and IPad.Also can be used to any other mobile,if we change the 3.5MM pin or add an adaptor.
1)On/Off button: calling: answer/hang up; Music: pause/ replay
2)Built-in Microphone: with sentitivity:-48dB
3)Volume control; It is the special selling port,because it can control the volume when talking or listening.