additional blink sync module for existing blink xt and xt2 video home security systems, black blink home security <p>the center of every blink video home security system, the blink sync module enables up-to 10 wire-free blink security cameras. blink customers with existing systems will add a second module to create different zones for indoor and outdoor cameras or control blink systems in multiple locations.</p> <p><strong>what is blink video home security?</strong></p> <p>blink is the completely wireless home security camera that sends motion-activated alerts & hd video to your smartphone. no contract, no wires and batteries that last 2 years!</p> <p><strong>note: the blink sync module is for existing systems and requires blink security cameras.</strong></p>