Easy Thermal Scope Zeroing Pulsar's heated thermal zeroing targets offer an easy and accurate way of zeroing thermal imaging rifle scopes. How to use: Please follow these 10 steps: The heat pack is air-activated, do not open the pad packaging until you are ready to use it. Open the packaging and take out the heat pad. Note - Do not cut or damage the heat pad while taking it out. Remove the paper strip from the back side of the heat pad to expose the adhesive surface. Stick the heat pad with the adhesive side to the center of the paper target marked with circle. Note - There is no need to shake the heat pad, it will warm itself up in 3-5 minutes. Attach the paper target to the desired location. Aim at the heated pad with a thermal imaging scope mounted on the firearm and optimize thermal view, so that thermal pad is clearly visible. Perform zeroing procedure as described in the user manual of your thermal imaging device. With the help of the round shape and small diameter of the pad, deviations of point of impact can be eliminated in just a few shots.