The mailer is for the Carphone Warehouse affinity partnership programme, enticing brands to promote tailored mobile phone packages through their communication channels.
The box contains a large pair of plastic ears. The strapline reads 'We've got the ear of your target market'. The pun on ears runs throughout the mailer, a creative way of reflecting the relevance of the partnership.
The box also contains a leaflet highlighting the benefits of the affinity offer and a separate phone cutout with contact details.
All in all, a refreshing example of a very targeted and creative business-to-business mailing with an interactive element that is likely to stimulate an audience.