Features: Made of high quality ABS material, solid and durable in use. Easy to read scale, accurately measure the altitude and barometric pressure. Battery-free, maintenance-free, easy to use in wild. Comes with a carabiner, portable and convenient to carry. Great accessory for climbing, skiing and other outdoor sports. Specifications: Material: ABS Altimeter Measuring Range: 0-5000 meter Barometer Pressuring Range: 580-1040hPa Temperature Measuring Range: -30-50 Storage Temperature: -30-65 Resolution Ratio: 20m Dial Diameter: 60mm / 2.4in Item Size: 85 * 68 * 28mm / 3.3 * 2.7 * 1.1in Package Size: 14.5 * 11 * 3.5cm / 5.7 * 4.3 * 1.4in Package Weight: 180g / 6.3oz Package List: 1 * Altimeter Note: The small thermometer and compass aredecorative and non-functional.