Multifunctional digital altimeter features electronic bearing sensor and air pressure sensor technology. Designed for outdoor use, the detachable lanyard allows the device to be easily carried in hand or around the neck 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 dormancy 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 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 Weather Forecast: Predicts conditions for next 12 to 24 hours (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 Material: ABS Package Contents: 1 x Multifunctional Altimeter Note: Light reflection and different displays may cause slight variations in color between the image and the actual item. Measurement error allowance: +/- 1-3 cm.