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Sonic grenade

The ultimate annoying fun gift, ideal to get a teenager out of bed! Just pull the pin and throw your grenade into a room. There is a 20 second delay before it emits an ear piercing siren. The only way it can be switched off is squeezing the handle and inserting the pin. Before you know it they will be out of bed with the grenade in their hand to find you, 'the pin holder'!

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Gadgets UK - Sonic grenade
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