Features: Equipped with a high-precision sensor. Altitude total gain/loss tracking. 24-hour altitude record and chart display. Max/min altitude, temperature, and humidity recording. 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. Note: Do not submerge in water. Specifications: Altimeter: - Range: -700 to 9000m (-2296 to 29500ft) - Resolution: 1 meter/foot - Max/Min memory for altitude - 24-hour altitude history with graphical display - Total altitude gain or loss up to 44999 meters/feet Barometer: - Pressure range: 300hPa to 1100hPa (8.84inHg to 32.44inHg) - Resolution: 0.1hPa (0.01inHg) - 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), selectable - Max/Min memory for temperature Hygrometer: - Relative humidity range: 20% to 95% - Max/Min memory for humidity Package: - Material: Plastic - Color: Black + yellow - Built-in battery: 300mAh - Item size: 10 x 6.5 x 2cm / 3.9 x 2.6 x 0.8in - Item weight: 70g / 2.5oz - Package size: 16 x 11 x 3.5cm / 6.3 x 4.3 x 1.4in - Package weight: 128g / 4.5oz Package List: 1 x Altimeter 1 x Charging Cable 1 x Lanyard 1 x Cleaning Cloth 1 x User Manual (English)