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 by hand or around the neck during various outdoor activities such as climbing, hiking, fishing, and camping.Features: 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. Stores up to 256 historical altitude and air pressure records for review. Powered by a 3V CR2032 button battery. Press and hold the "SET" button for 5 seconds to enter sleep mode and conserve battery life. Compact, lightweight design with included lanyard for portability. Made from high-quality materials for durability. Ideal for outdoor use including climbing, fishing, hiking, and camping.Note: Size and color may vary slightly due to manual measurement and lighting conditions. Specifications: Color: Black, Yellow Material: ABS 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), 2C accuracy, 1C resolution 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 Item Size: 93 x 54 x 15mm (3.66 x 2.13 x 0.59 in) Item Weight: 47g (1.64 oz) Package Size: 13.8 x 6.5 x 3cm (5.43 x 2.56 x 1.18 in) Package Weight: 80g (2.81 oz) Package List: 1 x Altimeter 1 x Lanyard 1 x User Manual (English)