Multifunctional digital altimeter features electronic bearing sensor and air pressure sensor technology. Designed for outdoor use, the detachable lanyard allows for hand or neck carry, making it ideal for climbing, hiking, fishing, camping, and other outdoor activities. 8-in-1 LCD multifunction digital altimeter with digital barometer, digital compass, thermometer, weather forecast, clock, calendar. LCD display with backlight for easy reading in low-light conditions. The device stores up to 256 historical altitude and air pressure records for review. Powered by a 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 design with included lanyard for portability. Made from premium quality ABS material for durability. Suitable for various outdoor applications including climbing, hiking, fishing, and camping. Note: Size and color may vary slightly due to manual measurement and lighting conditions. Screen: LCD with Backlight Altimeter: -2296~29500ft Range, 3ft Resolution Barometer: 350-1100hPa Range, 1hPa Resolution Compass: 3 degrees Accuracy, 1 degree resolution Thermometer: -5~50°C (-23~122°F) Range, ±2°C Accuracy, 1°C Resolution Temperature Unit: °C/°F Selectable Weather Forecast: Next 12 to 24 hours (Sunny, Slightly Sunny, Cloudy, Rain) Time Format: 12H/24H Time: Hour, minute, second 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 Altimeter Note: Light reflection and display differences may cause slight variations in item color shown. Measurement error allowance is +/- 1-3cm.