Player > Weapon > Grenades > Smoke grenade
Range: 20 ft.
Special: Explode (smoke cloud 1 minute, 20 ft.)
A smoke grenade deals no damage; instead, it releases a cloud of dense smoke. Each character who inhales smoke must succeed at a Fortitude saving throw each round (DC = 15 + 1 per previous check) or spend that round choking and coughing; he can do nothing else. A character who chokes for 2 consecutive rounds takes 1d6 nonlethal damage. (Active environmental protection from a suit of armor prevents this effect altogether.) Regardless of the armor a character wears, smoke obscures vision, granting concealment to anyone within it.
Explosives have the explode special property, which lists the amount of damage the explosion deals, the damage type, special effects (with a duration, if necessary), and the radius of the explosion. When you attack with this type of weapon or ammunition, aim at a grid intersection. Each creature within the blast radius takes the listed damage but can attempt a Reflex saving throw for half damage. If the explode special property has any special effects other than damage, they are negated with a successful saving throw. Some exploding weapons, such as smoke grenades, don’t deal damage, so they don’t include the damage and damage type entries.