Features: - Equipped with a high-precision sensor from Switzerland - Displays total altitude gain/loss and 24-hour altitude record with chart - Records maximum and minimum altitude, temperature, and humidity - 24-hour air pressure trend chart - Combines altimeter, barometer, and compass functions - Includes thermometer, hygrometer, time, date, alarm clock, and LED light - Built-in rechargeable battery - LCD with backlight - IPX4 water-resistant (not suitable for submersion) Specifications: Altimeter: - Range: -700 to 9000 meters (-2296 to 29500 feet) - Resolution: 1 meter/foot - Max/Min altitude memory - 24-hour altitude history with graphical display - Total altitude gain or loss up to 44999 meters/feet Barometer: - Pressure range: 300 hPa to 1100 hPa (8.84 inHg to 32.44 inHg) - Resolution: 0.1 hPa (0.01 inHg) - 24-hour pressure history with graphical display - Electronic weather forecast indicators (sunny, partly cloudy, cloudy, rainy) - Pressure trend indicators Thermometer: - Range: -20°C to 60°C (-4°F to 140°F), switchable - Max/Min temperature memory Hygrometer: - Humidity range: 20% to 95% relative humidity - Max/Min humidity memory Package Contents: - 1 x Altimeter - 1 x Charging Cable - 1 x Lanyard - 1 x Cleaning Cloth - 1 x User Manual (English) Item Details: - Material: Plastic - Color: Black + Yellow - Built-in Battery: 300 mAh - Item Size: 10 x 6.5 x 2 cm / 3.9 x 2.6 x 0.8 in - Item Weight: 70 g / 2.5 oz - Package Size: 16 x 11 x 3.5 cm / 6.3 x 4.3 x 1.4 in - Package Weight: 128 g / 4.5 oz