An early digital audio processor which allowed high-quality digital audio recordings to be made on to an unmodified video tape recorder. Advertised as 'the smallest and lightest digital audio processor in the world', it enabled the user to make digital recordings even outdoors. It was normally paired with the SL-F1 or SL-2000 Sony Betamax portable videorecorders (which matched it 'in every aspect of design, size, and performance'). It could be used with with any videocassette recorder format, including VHS. U-matic, and 1/4" types, probably why the BBC made use of it, in addition to its ability to outperform the then conventional analogue audio recorders. This particular unit was used at BBC Scotland.

It has with it a factory-made burgundy leatherette travel case, but the case is the one designed to fit the SL-F1 and therefore does not fit properly.