Multifunctional digital altimeter features electronic bearing sensor and air pressure sensor technology. Designed for outdoor use, the detachable lanyard allows for convenient hand or neck carry during activities such as climbing, hiking, fishing, and camping. 8-in-1 LCD multifunction digital altimeter with digital barometer, digital compass, thermometer, weather forecast, clock, and calendar. LCD display with backlight for easy reading in low-light conditions. The device can store up to 256 historical altitude and air pressure records for 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, lightweight design with included lanyard for portability. Constructed from premium ABS material for durability and reliable outdoor performance. 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), ±2°C accuracy, 1°C resolution Temperature Unit: Selectable Weather Forecast: 12 to 24-hour prediction (Sunny, Partly Sunny, Cloudy, Rain) Time Format: 12H/24H selectable Time Display: Hours, minutes, seconds Calendar: Month, date, year Power Supply: 1 x 3V CR2032 button battery (not included) Item Dimensions: 93 x 54 x 15 mm / 3.66 x 2.13 x 0.59 in Item Weight: 47 g / 1.64 oz Color: As shown Material: ABS Package Contents: 1 x Multifunctional Altimeter Note: The package includes only the items listed above. Other accessories are not included. Slight variations in color may occur due to lighting and screen settings. Size measurements may vary by +/- 1-3 cm due to manual measurement.