Product Description ⌚An altimeter tracks your vertical movement, a barometer tells the trend in air pressure, and a compass points the way，barometer helps you predict changing conditions; built in weather trend indicator ⌚Functions: altimeter, barometer, compass, temperature, steps track, world time, count down, alarm, back light ⌚High quality 164 ft /50m/5atm water resistance helps you do all kinds of indoor/outdoor sports or daily use freely. it’s a great companion for swimming, climbing, cycling ,⌚Upgraded version of apache, lighter and smaller, built with tempered glass, stainless steel case, and nylon band, durable watch for a long time using Function 1, Altimeter (altitude trend chart and climb rate) 2, Barometer ( air pressure trend chart) 3, Compass 4, Thermometer 5, Weather Forecast 6, Pedometer, step counter, calorie, distance record 7, Time functions: hour, minute, second, year(2000-2099), month, date, weekday, 8, Alarm clock (2 sets alarm clock, ) 9, Countdown timer (99:59:59~0) 10, Stopwatch (0~:59:59), 12, Second Time functions 13, Corporates digital compass, altimeter, barometer, Thermometer, air pressure trend and altitude trend and altitude trend 14, Button tone on or off 15, Battery life remind 16, EL Backlight