Glow Spiral Earring comes in a pack of 2. No battery required. Comes in assorted color. A fun accessory for Halloween parties, glow in the dakr parties, camping trips etc. HOW TO USE 1) All the glow in dark products should be handled with care to avoid accidental activation. 2) Remove product from packaging, Holding the extremities of light stick, bend once,snap and shake. Note : 1) One time use product only. 2) Minimum of 8 hrs glow and max up to 12 hrs.