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. Features: 8-in-1 LCD multifunction digital altimeter with digital barometer, digital compass, thermometer, weather forecast, clock, and calendar. LCD display with backlight for clear visibility in low-light conditions. The device can store up to 256 historical records of altitude and air pressure 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 power. Compact and lightweight design with included lanyard for easy portability. Made from high-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. 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 50°C (-23 to 122°F), accuracy ±2°C, resolution 1°C Temperature Unit: Selectable Weather Forecast: Predicts conditions for the next 12 to 24 hours (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 Item Size: 93 x 54 x 15mm / 3.66 x 2.13 x 0.59in Item Weight: 47g / 1.64oz Package Size: 13.8 x 6.5 x 3cm / 5.43 x 2.56 x 1.18in Package Weight: 80g / 2.81oz Package List: 1 x Altimeter 1 x Lanyard 1 x User Manual (English)