POLICE Red Blue Flashing Heart Motion Activated. These are like police flashing lights. The Red flashes twice quickly, then the blue flash twice quickly and so on. These are powered by 5v USB cable which is included. When someone or something passes near the face, the circuit is activated and the heart will double flash alternately between RED & BLUE. The circuit is activated for about 10 seconds. After a short delay, the circuit is ready to activate again when it senses movement. This is a unique gift for your loved one. No batteries required. When the unit is first powered up the cycle will begin. It will take about 60 seconds for the PIR to stabilize. Once stabilized the unit will repeat the cycle every time there is movement in front of the unit, There is a dwell time of 6 to 11 seconds from the finish of one cycle until the next cycle can begin. This is a nice unit that can be displayed all the time.