I not sure you can what you have in mind as the readers are intended to link via blue tooth to the "app" which is designed for phones and/or tablets.
If your intent is to use a laptop, then you may want to look into another PayPal product - Virtual Terminal. Virtual Terminal is part of the Payments Pro solution. It allows you to accept payments virtually anywhere there is Internet access, with no card swipe or software to install however it does cost $30/month. There's no setup, termination or withdrawal fees and there is a per-transaction fees of 3.1% + $0.30.
