- has a on/off switch built in 
<br />- You can switch between quick and slow flashing
<br />- Measures 6.3cm in diameter
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<br />                                                                            Dimensions: 3.23 in x 3.23 in x 0.39 in (8.2 cm x 8.2 cm x 1.0 cm)
<br />Weight: 1.06 oz (30 g)
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