19 Weird but Real Gadgets and Gizmos

We've got vacuums for your lawn, swimwear that can charge your iPod, and grenades that don't explode but still go boom.

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Sonic Grenade

This grenade may not explode, but it can still make a lot of noise. Just pull the pin, toss it, wait about 20 seconds, and the grenade lets out an annoying beep that puts your alarm clock to shame. To silence it, hold down the trigger arm or replace the pin. The sonic grenade has three volume settings and is powered by three AAA batteries. Buy it from Firebox for about $15.

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