... accessories, just twist open knobs for sealing out water, sand and dust2. Floats safely if dropped in the water3. Adjustable neck ... clip4. Great for traveling, hiking, at the beach, boating, and many more water filed activities5.PVC ,TPU,non-toxic, small ... Floats on water surfaceMost suitable item for promotional and gifts which is in large quantity and under low budget. Offset photo printing,express ...