Description of Tech40 Alti-Watch Black Log the highs from rock climbing, hang gliding, mountain biking, hiking and more. The Alti-Watch gives you cumulative and maximum altitude readings, plus with barometric pressure and temperature readings to keep you up on current weather conditions. Features: Advanced European pressure sensor tracks altitude, ascents and descents Powerful logbook tracks vertical feet you’ve skied for up to a year Built-in barometer, thermometer, time and date functions, light Total ascent & descent Altimeter Current Altitude Maximum Altitude Daily Ascent Daily Descent Barometer Current Pressure Max Daily Pressure Min Daily Pressure 24hr Pressure Difference 24hr / 2hr Pressure Trend Graph Thermometer Current Temperature Max Daily Temp Min Daily Temp 24hr Temp Difference Time, Date, Day, Alarm, Light, Stopwatch, Countdown Timer, Alternate Time Zone