The medium of presenting information in modern times is largely by electronic, often wireless methods. Low power RF modules find applications in audience participation of TV shows – “everybody vote now”, electronic questionnaires, and in the ability to transfer short text messages and graphics data between remote points –remote keypad data and “still” camera images can be sent from awkward or hazardous areas using a modem for onward transmission. In the area of commerce, an example product containing an RF module would be a wireless barcode scanner, useful in EPOS or asset tracking applications. Shops may use electronic display signs containing RF modules for rapid or targeted updates (e.g. special offers).