NOT the cheap cable sold, ( 4 Core / diameter: 2mm ), the 4 core cable is rather slim and poor performance, which only for sync charge NOT support audio and video transfer. Be ware that many dock extension cable sold not support audio/video.
Product Type: 17 Core 30 Pin Dock connector Male To Femal Cable
Support: Composite Vdieo and Audio, Sync Charger (The other Cable will only support Charge)
Dimension: 1m / 3Ft.
iPhone 3G 16GB, iPhone 3G 8GB, iphone 3GS, iphone 4, iphone 4S
iPad: iPad 1th, iPad 2nd, the New iPad.
iPod 4th, 5th.
iPod touch 1st 2nd 3rd generation: 8GB 16GB 32GB 64GB
iPod nano 1st 2nd 3rd 4th 5th 6th generation.
1 x 30 Pin Docke extnesion Cable for iPhone iPad iPod Compoiste Video and Auio, Sync Charger