Pass Through Connector For Cable Attachment In Bottom Of Holder/ Passes Through All 30 Pins/ Custom Fit To Your Device/ Holds Device Securely/ Neat And Discreet Design Blends Well With Vehicle's Interior/ Holder Can Tilt 15 Degrees In Any Direction And Swivel 360 Degrees/ Made Of Heat And Cold Resistant ABS Plastic/ Compatible With iPhone 4/ Black Finish