Zip-linq's uniquely designed retractable modem, telephone cable is a must for mobile PC users that require one of the most advance space saving technologies available. This compact spool of high quality cable extends to over 4' in seconds, just by pulling. Simply pull again and it retracts back into its durable plastic housing. Connect your computer modem to a telephone jack. Easily extends to over 4' by pulling both ends. Simply pull again and it quickly retracts back into its housing. Durable ABS plastic housing less then 4" long when retracted! The perfect telephone cable solution for mobile users on the go!