Go Direct* Ammonium Ion-Selective Electrode, Range: 1 to 18,000 mg/L, 2-7 PH, 0.1 to 5 M omega Electrode resistance, 300 mA Li-Poly Battery, 500full charge cycles (several years depending on usage)Battery life, connects via Bluetooth* wireless technology
Go Direct* Chloride Ion-Selective Electrode User Manual, contains: bottle of High Standard solution with SDS (1000 mg), bottle of Low Standard solution with SDS (10 mg/L Cl-), Short-Term ISE Soaking Bottle, Polishing strip, Micro USB Cable