Enjoy the Ultimate Convenience of Hands-Free Cell Phone Uuse - and Comply With Regulations Restricting Use of Cell Phones While Driving—Courtesy of the BLU LOGIC® Hands-Free System. BLU LOGIC Integrates With Your Factory Audio System Speakers, Allowing You to Answer Incoming Calls With the Push of a Button, While Outgoing Calls are as Simple as Speaking Into the Fixed Microphone Provided.