Use with Vernier pH electrodes, or third-party electrodes such as pH, ISE (ion-selective electrode), or ORP (oxidation-reduction potential) Compatible interfaces: LabQuest™ 2, Original LabQuest, LabQuest Mini, GoLink™, SensorDAQ™, NXT Sensor Adapter, LabPro™, EasyLink™, CBL 2, TI-Nspire Lab Cradle™ Recommended for College and High School Specifications: Power: 7mA at 5VDC Input: range -450mV to +1100mV Impedance: 100 MΩ Gain: 2.2V/V Offset: 1.20V (nominal) Order Info Interface, electrode, and software sold separately.