The VARIO® can operate continuously for 1500 hours on one easily replaceable AA (1.5 V) battery. VARIO® comes standard with an intelligent glass electrode that is protected by a plastic casing. The conical protective cap does not require KCI which prevents the electrode from dripping and protects it from drying out. The VARIO® can do even more. The adapter contained in the VARIO® Set makes the instrument compatible with commercially available precision electrodes. The VARIO® measures as accurately and reliably as a handheld instrument. You can twist and turn as much as you want, the VARIO® is an essential aid whenever speed is required in the laboratory or in production.