... 3.5 mm audio line;; Power off for audio input from mp3/mp4/PSP etc.Phone linePower off for ... audio input to answer or hang up the phone for call chat..PC linePower off and connected ... to PC with Mike line for web voice call.AccessibilityLED indication,mp3,TF ... (139g)optional line: 3.5 to 3.5 line (7g) ,Iphone line (9g), HTC line,(9g),Nokia N95 line, pc line, 10440 lithium ...