With the same tried-and-true one button simplicity and durability of the original TacSight S1, the Bullard TacSight S2 incorporates an upgraded amorphous silicon engine for improved image clarity and picture definition. The optional Electronic Threat Tagging tool enables the operator to tag heat sources in blue for improved visibility and tracking. The S2's accessores include MobileLink for remote monitoring and recording, TacPowerhouse for easy charging, TacPort fixed mount for surveillance and TacScope for display dimming.heat picture of their surroundings, providing them a range of abilities they do not have when using night vision or flashlights. TacSight detects extremely small differences in temperature, so officers can distinguish people from their immediate surroundings. Needing no light to operate, TacSight generates high quality images on the darkest nights, even through smoke.