Specially designed for outdoor fans for hiking, climbing, camping. Combines GPS & Beidou satellite together, multi-function and versatile, can work as altimeter, compass, barometer, hygrometer, etc. It is a really competitive outdoor equipment. Features: GPS & Beidou dual navigation system, double satellite location, ensures more accurate navigation. Multi-function, it shows many important data such as altitude, climbing speed, compass, atmospheric pressure, time, temperature, humidity, etc. Made of top chip and good quality plastic, sturdy and durable, working temperature is -20℃ to 60℃, can withstand harsh weather conditions, suitable for many places to use. Supports USB charging, easy to use, large capacity battery can offer long standby and working endurance. Equipped with a mini torch on the top, can offer illumination in emergency, also suitable for night outdoor activities. IPX4 grade waterproof, portable and lightweight, easy to carry and pratcial to use. User-friendly, with many function buttons on the side to makes you quickly change mode or search for data. Widely applicable to many uses, hiking, climbing, camping, etc. Specification: Material: ABS Color: Yellow&Black Waterproof: IP44 Size: approx. 100*66*20mm / 3.9*2.6*0.8inch Weight: approx. 126g Package List: 1 x Multi-function Barometer 1 x USB Cable 1 x Manual 1 x Lanyard .