Features:Functions include: Compass, Altimeter, Thermometer, Barometer, Clock and Calendar, and Weather Forecast.Can record 256 sets of altitude and barometric pressure data history. With a large LCD display screens.LED backlight, convenient to see at night.With a lanyard for carring.Lightweight & compact, easy to handle and carry.High quality, waterproof and slim design.Ideal for motoring, boating, camping, mountaineering, hunting and any other outdoor activities.Specifications:Altimeter Format: M or FAltimeter Range: -700m ~ 9000m; -2296 ~ 29500fBarometer Range: 350 - 1100hpaCompass Range: 0 - 359 DegreeCompass Accuracy: +/- 3 DegreeDiaplay Mode: 360 degree with 16 cardinal point segmentsTemperature Format: ºC or FTemperature Range: -5 to ~ 50ºCCalendar: Year, month, date, timeClock Format: 24h or 12h (AM/PM)Weather Forecast: Sunny, slight sunny, cloudy, rainHistory Data: 256 setsLCD Display: 4.5*3cmPower Supply: 3V CR2032 lithium battery (not included)Item Size: 98 * 52 * 15mmItem Weight: 48gPackage Size: 140 * 60 * 21mmPackage Weight: 63g Package Includes:1 * Multifunctional Outdoor Survival Kit1 * Lanyard1 * User Manual