BTER Sturdy and Durable Digital Altimeter Barometer, Digital Altimeter, Handheld USB Hygrometer Digital Barometer, Rechargeable Digital Altimeter Climbing for Hiking Brand: BTERFeatures: GPS & Beidou dual navigation system, double satellite location, ensures more accurate ...BTER Sturdy and Durable Digital Altimeter Barometer, Digital Altimeter, Handheld USB Hygrometer Digital Barometer, Rechargeable Digital Altimeter Climbing for Hiking Brand: BTERFeatures: 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°C to 60°C, can withstand harsh weather conditions, suitable for many places to use - Equipped with a mini torch on the top, can offer illumination in emergency, also suitable for night outdoor activities - Supports USB charging, easy to use, large capacity battery can offer long standby and working endurance - Package Dimensions: 6.3 x 4.3 x 1.6 inches