Directions for use: Remove the soft black cap from the end of the packaged pen Place a wick in the pen by pressing on the opposite end of the pen to open the jaws and insert the wick. Adjust the wick to expose approximately 3/8” from the end of the pen. Light the tip of the wick and allow it to burn for 10-15 seconds. Blow out the flame and the pen will provide a continuous tail of smoke. For smoke alarm testing, position the actively smoking pen 6-10” inches from the smoke sensor or air sampling device to activate alarm. Extinguish the wick by simply replacing the soft plastic cap over the wick end of the pen. To re-use, simply adjust the wick and follow the steps above. This product has a long shelf life and should be stored in a cool dry environment.