USB Data Hotsync & Charging Retractable Cable For Amazon Kindle DX USB Data Hotsync & Charging Retractable Cable for Amazon Kindle DX Connect your Kindle with your PC/Laptop by USB port. Software & technical support not included. 2-In-1 Features: Hotsysnc & Charging. Retractable designed prevent tangled cable mess. Extend the cord with your desired length.