Approaches provide for a mobile point-of-sale system configured to facilitate the transfer of funds between entities (e.g., customers and merchants). A card reader can include two different types of slots configured for conducting a financial transaction between entities. A first slot can allow for a magnetic stripe element of a card to be swiped. A second slot can include contact elements which allow the card to be “dipped in”. In this way, the device can receive a swipe and/or a “dipping” of a card into a respective slot for conducting a financial transaction.