The Socket CF Mag Stripe Reader 4E reads data from one, two, or three track magnetic stripes on ID cards, driver's licenses or credit cards. It plugs into the CompactFlash card slot of your Pocket PC, laptop, or tablet PC. CF Mag Stripe Reader 4E can be used in conjunction with a cellular or Wi-Fi network to perform credit card authorizations on the go, turning your mobile device into a POS terminal. SocketScan software enters data directly into any Windows application as if it were manually typed, and requires no custom programming. The SocketScan SDK can be used for creating more complex applications using parsed or encrypted data.