The unit comes in a compact chassis for easy portability and remote use. The circuitry is factory adjusted to provide the correct heater current, and the meter face is calibrated to reflect the pressure in milliTorr.
Battery lifetime is somewhat variable due to battery manufacturers' specifications.
However, factory tested units have lasted over 700 hrs. Periodic shutdown when not in use will significantly prolong useful operation with one battery set. Battery lifetime is easily monitored with a battery check on the front panel. 6' long Weight 3.0 lbs. The setpoint is adjustable through the rear of the panel and can be easily changed without any disassembly.