HQD HQ430D Water Quality Laboratory Biochemical Oxygen Demand (BOD) Meter Package with Optical LBOD101 SensorIncludesMeter package includes HQ430D Laboratory Multi Meter-LBOD101 Luminescent/Optical Dissolved Oxygen (LDO) electrode for BOD Measurement with 1 m cable-Disposable 300 mL BOD Bottle (100 pcs)-BOD Bottle Stoppers (25 pcs)-BOD Bottle cap (6 pcs)-4 Alkaline 1 5V AA batteries-Power Supply Adapter-Power Cord-USB cable for data transfer-and Operating Documentation