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 carrying 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 3V CR2032 button battery (battery not included). Press and hold the 'SET' button for 5 seconds to enter sleep mode and conserve battery power. Compact, lightweight design with included lanyard for portability. Made from premium quality ABS material for durability. Ideal for outdoor adventures 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 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 50C (-23 to 122F), accuracy 2C, resolution 1C Temperature Unit: Selectable Weather Forecast: 12 to 24-hour prediction (Sunny, Partly Sunny, Cloudy, Rain) Time Format: 12H/24H 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 15 mm / 3.66 x 2.13 x 0.59 in Item Weight: 47 g / 1.64 oz Color: As shown in picture Material: ABS Package Contents: 1 x Multifunctional Altimeter Note: Light reflection and screen differences may cause slight variations in color between the image and the actual item. Measurement error allowed is +/- 1-3 cm.