Multifunctional digital altimeter features electronic bearing sensor and air pressure sensor technology. Designed for outdoor use, the detachable lanyard allows the device to be carried comfortably in hand or around the neck, making it ideal for 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. 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 power-saving dormancy mode. Compact and lightweight design with included lanyard for portability. Made from high-quality ABS material for durability. Suitable for various 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, 1°C resolution Temperature Unit: Selectable Weather Forecast: Predicts conditions for next 12 to 24 hours (Sunny, Slightly Sunny, Cloudy, Rain) Time Format: 12H/24H Time Display: Hour, minute, second Calendar: Month, date, year Power Supply: 1 x 3V CR2032 button battery Item Size: 93 x 54 x 15 mm / 3.66 x 2.13 x 0.59 in Item Weight: 47g / 1.64 oz Package Size: 13.8 x 6.5 x 3 cm / 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)