Multifunctional digital altimeter features electronic bearing sensor and air pressure sensor technology. Designed for outdoor use, it includes a detachable lanyard, making it convenient to carry by hand or around the neck during activities such as climbing, hiking, fishing, and camping. This 8-in-1 LCD multifunction device includes a digital barometer, digital compass, thermometer, weather forecast, clock, calendar, and more. The LCD screen has a backlight for easy reading in low-light conditions. The altimeter can store up to 256 historical records of altitude and air pressure for later review. Powered by a single 3V CR2032 button battery (battery not included). Press and hold the 'SET' button for 5 seconds to enter power-saving dormancy mode. Compact and lightweight with a pocket-sized design, it comes with a lanyard for portability. Made from high-quality ABS material for durability, ideal for various outdoor adventures. Note: Size and color may vary slightly due to manual measurement and differences in lighting or screen display. Screen: LCD with Backlight Altimeter Range: -2296 to 29500 ft, 3 ft resolution Barometer Range: 350 to 1100 hPa, 1 hPa resolution Compass Accuracy: ±3 degrees, 1 degree resolution Thermometer Range: -5 to 50°C (-23 to 122°F), accuracy ±2°C, resolution 1°C Temperature Unit: Selectable (°C/°F) Weather Forecast: Predicts conditions for next 12 to 24 hours (Sunny, Slightly Sunny, Cloudy, Rain) Time Format: 12H or 24H selectable Time Display: Hours, minutes, seconds Calendar: Month, date, year Power Supply: 1 x 3V CR2032 Button Battery (battery not included) Item Size: 93 x 54 x 15mm / 3.66 x 2.13 x 0.59in Item Weight: 47g / 1.64oz Color: As shown Material: ABS Package Contents: 1 x Multifunctional Digital Altimeter Note: Other items not included. Due to lighting effects and monitor settings, the actual color of the item may vary slightly from images. Measurement tolerance: ±1-3cm.