1. Solar powered, no other batteries is required, the logo will flash under any kind of light, such as lamp light, sun light.
2. Waterproof, logo can be imprinted, good for your premiums, promotional gifts and collection.
Size: 60 x 25 x 8mm (big), 46 x 26 x 8mm (middle), 35 x 18 x 8mm (small).
China
