These rechargeable sound amplifiers run up to 20 hours on a single charge! Wonderfully small, lightweight and discreet, yet they amplify sound up to 30X. Includes charging cradle with adapter, 12 silicone ear buds in 3 different sizes and cleaning brush. 8-hour charge time. Weighs just 3 oz. for ultra-comfortable wearing. Unisex. Fits right or left ear. Not waterproof.