Vector Security TowerThis Vector retail security tower is Checkpoint 8. 2 MHz frequency. The Vector stop shoplifting security system is a fantastic way to protect a 3 foot door by putting the tower on the handle side of a 3 ft door. You can also place this unit in the middle of a 6 foot double door opening. Vector is a transceiver system and requires only one antenna to make it work. This system can detect both hard tags and disposable paper labels. These systems require