Sirius merged with XM Satellite Radio in July 2008 after a lengthy regulatory review and is now the largest domestic subscription radio broadcaster, with more than 23 million subscribers. The company provides a subscription-based digital radio service whose broadcast signals originate from satellites. Its primary means of distributing satellite radios is through the sale and lease of new vehicles. Sirius has agreements to offer its hardware with every major automaker as factory- or dealer-installed equipment.