This audio headset adapter cable allows the connection of a conventional PC headset to the 4-pin. Audio output, as it is used eg in smartphones, mobile phones and notebooks. The pin assignment of the adapter works eg with Apple iPod touch 2G, the iPhone (3G, 3GS, 4, 4S, 5), MacBook Pro, MacBook Air, HTC smartphones (eg Legend), as well as some Lenovo notebooks ( eg Thinkpad T510 series) or DELL Latitude notebooks. This 15 cm long Y-adapter cable combines a single-jack (1x 3.5 mm stereo) with a dual-jack connector (2x 3.5 mm stereo jack). Technical details:Length: 0.15 mColor: black, red, greenConnections: 1x 3.5mm stereo jack (male) 2x 3.5mm stereo jack (female)