The silicone cases and interface design ensure shockproof, dustproof, level up to Ipx5. Built In rechargeable battery, supports up To 5-6 hours playing time at the normal volume. Don't let the water stop you from enjoying your favorite music, great companion for beach, poolside, on boat, shower room, bathtub, or kitchen. (Do Not Immerse It Into Water) 3 11/32"D