To operate the smoke grenade, hold upright and pull the ring igniter to the side.  What follows is 90 seconds of brilliantly coloured, non-toxic smoke. Smoke from the WP40 is delivered from a single vent at the top of the grenade.

CAUTION: Hot gas, sparks or ash may be emitted on ignition or during effect. If you plan to hold the device during its operation, only do so with Gloves and Eye protection. Otherwise, pull the wire to ignite and then immediately place or drop device on a non-flammable surface, maintaining a 2-meter safety distance. Follow all directions and warnings on product label. For outdoor use only.