The Hiss Incendiary Grenade is a compact, cylindrical device with a matte black metal casing, featuring a single red LED indicator light near the top. Its surface is slightly weathered with visible scratches and minor dents, suggesting prior use. The grenade has a segmented design with a grooved texture for grip, and a pull-ring mechanism at the top for activation. Upon detonation, it releases a vibrant, glowing orange fireball, leaving behind a scorched, smoky effect in its vicinity.