After a 20 second delay your Sonic Grenade will sound its annoying alarm continuously until you replace the pin.

Very annoying.

Probably the most annoying device in the world wake recalcitrant teenagers annoy parents or teachers interrupt meetings etc.

Three annoying pitch levels.

Requires 3 x AAA batteries not included.

Did we mention its annoying Specifications Size 125 mm high Battteries 3 x AAA not included