If you need to connect a PDA, digital camera, modem or an isdn terminal with a serial port to your laptop or tablet, then Tripp Lite's u209-005-db25 USB-to-Serial cable adapter is a great choice. The u209-005-db25 allows you to connect legacy rs232 peripherals with either a 9-pin db9 or 25-pin db25 connector to your computer's USB port. The u209-005-db25 comes with USB a (male) and db9 (male) connectors; the included db9-to-db25 cable adapter can be inserted onto the db9 connector for use in usb-to-db25 (m/m) connections. The cable is plug-and-play and requires no external power. The u209-005-db25 supports data transfer rates up to 230 kbps and has a 5-feet overall length. It is compatible with windows, mac and Linux operating systems, as well as android tablets/phones with a USB host mode (OTG) cable (Tripp lite u052-06n) and OS version 3.2 And above. Key features connect a rs232 serial device to the USB port on your computer connectors: USB-A (m); db25 (m); db9 (m) no external power is required supports data transfer rates up to 230 kbps premium double-shielded cable with gold-plated contacts, tinned copper braid and an aluminum Mylar foil shield that eliminates cross-talk and reduces EMI/RFI interference compatible with windows, mac and Linux computers compatible with android tablets/phones with USB host mode (OTG) support and OS version 3.2 And above 2-year limited warranty package includes u209-005-db25 usb-to-db25 serial cable adapter db9-to-db25 adapter owner's manual.