Abstract: A connection for audio transfer, the connection comprising: (a) a first cable for operative connection to a first audio reproduction device, the first audio reproduction device including an audio player; (b) a first connector at an end of the first cable remote from the first audio reproduction device; (c) a second cable for operative connection to a second audio reproduction device; (d) a second connector at an end of the second cable remote from the second audio reproduction device; (e) the first connector being able to operatively connect with the second connector to enable audio transfer from the audio player to the second audio reproduction device, and to operatively connect with a host for audio transfer between the host and the audio player.

Abstract: A dual data connector to enable a digital apparatus to be connected to at least one host apparatus, the dual connector comprising a first connecting of a first interface for connecting with a corresponding further connecting part of the first interface of an apparatus; and a part connecting part of a second interface for connecting with a corresponding other connecting part of the second interface of the apparatus, the first connecting part being electrically in parallel with the second connecting part, such that if the apparatus has only one of the first interface and the second interface, the relevant one of the first connecting part and the connecting part can be used to enable data transfer to take place. A portable digital data storage device with dual data connectors is also disclosed.