Victorinox

The digital altimeter has an altitude measurement range of -100 to +6000m or -300 to +18000ft.
It must be frequently (re-)calibrated for the region, and weather conditions (ie. changes in barometric pressure), in which it will be used - see instructions.

The tool also contains a digital thermometer that can measure the range of -20°C to +60ºC or 0ºF to +140ºF.

The Swiss shield in the scales acts as a push-button switch to activate the display, set calibration, and select units of measurement.

The altimeter tool/function was originally only available in the digital scale display of the Altimeter models.
In approx 2008 the digital functions of the Altimeter were added to the Voyager clock/timer functions to give the new combined digital scale tool that became available with the new Traveller related models, a barometer was also added to the capabilities.

This tool uses a 3-volt lithium battery (button cell CR 1225).