QUALIFIED MATERIAL: This multi-functional compass is made of high quality ABS plastic material, which is durable, corrosion resistant and environmental friendly.FEATURES: The compass is based on the technology of electronic bearing sensor and barometric sensor.SUPPLY A ROPE: The outdoor compass is equipped with a rope that very convenient to carry.ESSENTIAL ACCESSORY: The compass is suitable for outdoor sports enthusiasts with a wide range of essential and more precise information.PERFECT AND PRACTICAL TOOL: This outdoor compass is an ideal for outdoor sports enthusiasts made the simple type of equipment.Specifications:Material: ABSColor: BlackPackage Weight: approx. 94gSize: approx. 9 x 5 x 2cm / 3.54" x 1.96" x 0.78"Strap Material: Cotton FabricBattery: 2 x AAA batteries (not included)8 in 1 Function:Altimeter(Range): -700 meters - 9000 meters / -2300-2950ft (resolution ratio-1m/3ft) Barometer(Range): 350mbar-1100mbar (resolution ratio-0.1mbar) Digital Compass: show bearing in degrees and cardinal point Thermometer(Range): -10 Degree to +60 Degree, (Format ):F/C Weather Forecast: Start the machine, it can forecast the weather in the next 12-24 hours, the effective range of 30-50km LED Backlight: In any state, press any key to open the backlight, when open backlight, press any key to extend the time of 5 seconds Clock Format: 12Hr/24Hr (AM/PM) Battery: 2 x AAA batteries (Not Included)Package Included:1 x digital altimeter1 x rope1 x manual