PURE Digital ST1 Extension Speaker ?

PURE Digital ST1 Extension speaker as New An extension speaker for use with the Pure Digital EVOKE-1 and Tempus-1 DAB radios, the addition of this unit transforms these models to a Stereo unit. Owned from new, it is in as new/mint condition, had very light use and tested when photo was taken. Size: 105w x 149h x 90d mm