A sonic grenade.
A sonic grenade was an explosive device, a type of grenade, utilized by the Klingons in the 23rd century.
In 2267, while trapped on Organia during a Klingon military occupation of that planet, Captain Kirk and Commander Spock snuck into a Klingon munitions dump and, using one of the Klingons' sonic grenades, set off a large explosion, in an attempt to start a resistance. (TOS: "Errand of Mercy")
The sonic grenade is similar in appearance to a fragmentation grenade.
External link[]
- Sonic grenade at Memory Beta, the wiki for licensed Star Trek works