Primos Power Crystal Pot Call - The Power Crystal's super hard surface easily peaks at 15,000 Hz due to a combination of the crystal surface and the acoustics of the pot's internal sound board. For easy handling and control, superb tones and super loud calling, our Power Crystal is the call to choose. Includes hardwood strikerIncludes conditioning pad and super abrasive sandpaperCrystal surface is super-hard, creating calls that peak at 15,000 Hz