Features 1、Made of high‑quality ABS plastic, durable, corrosion‑resistant and environmentally‑friendly. 2、The device is based on electronic orientation sensor and air pressure sensor technology. 3、It is very convenient to carry with rope. Small and portable, has a long service life. 4、Provide a variety of basic and more accurate information for outdoor enthusiasts. 5、A simple type of equipment is made for outdoor enthusiasts. Simple to use. Specifications Condition: 100% Brand New Item Type: Altimeter Material: ABS Weight: Approx. 92g / 3.2oz Product Size: Approx. 9.1 x 5cm / 3.6 x 2.0 in Color: Black Battery: 2 x AAA battery (Not Included) Function: Altimeter (range): Up to 999.9 meters / 3280 feet (resolution ratio of 3 m / 9 feet) Barometer (range): 350mbar-1100mbar (resolution ratio -0.1mbar) Digital Compass: Display bearing in degrees and base points Thermometer (range): -10 degrees to +60 degrees, (format): °F / °C Weather Forecast: Start the machine, you can forecast the weather within 12-24 hours, the effective range is 30-50km LED Backlight: In any state, press any one to turn on the backlight. When the backlight is turned on, press any one to extend the time for 5 seconds Clock Format: 12Hr / 24Hr (AM / PM) Package List 1 x Digital Altimeter (Batteries Not Included) 1 x Rope 1 x Manual