The Retrak ETCH31SMART Retractable 3-in-1 USB/Car/Wall Charger and USB Sync works across multiple carriers and can charge your devices in the car, at home or at the office. This 3-in-1 charger also lets you sync your devices to a computer. It works with most smartphones and any device that has a mini-5 pin connection. What makes the ETCH31SMART truly special is the retractable cable that can expand over 3 feet for optimal freedom.