1. Made of high-quality ABS plastic material, it is sturdy, durable, corrosion-resistant, and environmentally friendly. 2. The device is based on electronic azimuth sensor and barometric sensor technologies. 3. It is equipped with a lanyard, making it very convenient to carry. 4. It provides all kinds of necessary and more accurate information for outdoor sports enthusiasts. 5. It is very suitable for outdoor sports enthusiasts and is made into a simple device. Specifications: - Material: ABS - Color: Black - Packaging weight: Approximately 94G - Dimensions: Approximately 9 x 5 x 2cm / 3.54" x 1.96" x 0.78" - Belt material: Cotton cloth - Battery: 2 AAA batteries (not included) Eight-in-one functions: - Altimeter (range): -700 meters - 9000 meters / -2300 - 2950 feet (resolution -1 meter / 3 feet) - Barometer (range): 350MBAR - 1100MBAR (resolution -0.1MBAR) - Digital compass: Displays azimuth in degrees and cardinal points - Thermometer (range): -10 degrees to +60 degrees, (format): °F/°C - Weather forecast: Start the machine to predict the weather within the next 12 - 24 hours - effective range is 30 - 50 kilometers - LED lighting range: In any state, press any key to turn on the backlight. When the backlight is on, press any key to extend it for 5 seconds - Clock format: 12h/24h (AM/PM) - Battery: 2 AAA batteries (not included) Package includes: 1. 1 x Digital altimeter 2. 1 x Rope 3. 1 x Manual Notes: 1. Avoid using it in the rain, in a humid environment, or at excessively high or low temperatures (operating temperature: 0°C - 50°C, storage temperature: 20°C - 70°C). 2. Avoid contact with corrosive substances such as perfume, alcohol, and cleaning agents. 3. Avoid using it in areas that may affect the normal magnetic compass: - Near concrete/steel structures, near power plants, near household appliances (such as computers, TVs, VCDs, fax machines, speakers, etc.) - Near bridges, in places made of a large amount of steel or metal, near moving vehicles (cars, trains, airplanes) - Near or on the surface of metal plates.