Triple-sensor Protrek Pathfinder. Case measures 50mm diameter by 15mm thick. Titanium link bracelet secures the watch to your wrist with a fold over deployment clasp. Duplex LC display with full auto EL light selectable illumination duration and afterglow. Multi-band 6 atomic timekeeping. Updates auto-receive up to six* times a day with remaining auto receives canceled as soon as one is successful. *5 times a day for the Chinese calibration signal. Manual receive function also available. Last time received display. World Time 31 time zones (48 cities) city code display daylight saving on/off. 24h chronograph measures in 1/100sec increments. Measures elapsed time split time 1st-2nd place times. 60min countdown timer counts in as small as 1sec increments. Time up alarm progress beeper 5 independent daily alarms. 12/24-hour format. Full auto-calendar to year 2099. Hourly time signal. Button operation tone on/off. Altimeter measures from -700-10000m/-2300/32800f in 5m/20f increments. Hand indication of altitude differential. Manual memory measurements up to 14 records each including altitude date time. High/Low altitude memory. Total ascent/decent memory. Reference altitude setting altitude tendency graph. Barometer measures 260-1100 hPa/7.65-32.45inHg in 1hPa/0.05 inHg increments. Hand indication of pressure differential. Atmospheric pressure tendency graph. Barometricv pressure change indicator.