This product has been discontinued by the manufacturer. Please contact us for the closest replacement - 1.DORP1+ Meter (battery pre-installed)2.222mV ORP standard solution: 30ml 3.3mol KCl pH/ORP soaking solution, 10mL, 1 bottle4.Sample Vials: 1pcs5.Lanyard: 1pc6.Hard carrying case: 1pc