By using the IR Light Kit, a wall of IR light is created giving ShadowTracker
an almost virtual floor to ceiling trigger system. We have placed these 12 feet above ShadowTracker
with great success. If there is a limit to height we haven't found it yet. This kit gives you the ability to use with up to 10 ShadowTracker's
in a doorway, hallway or between close walls situation. The batteries last approximately 2.5hrs and take approximately 5hrs to charge. Runs on one 18650 Li-ion Rechargeable Battery (Included in kit along with charging unit).