Waterproof LED Digital Thermometer Compass Outdoor Altimeter Altitude Meter Barometer

Description :
-The device is based on the technology of electronic bearing sensor and barometric sensor. The digital altimeter is designed for outdoor use, the detachable string makes the digital compass a perfect hand-carry device for various outdoor activates it will give you backlight when you press any button in any time. 
-8 in 1 Function: Digital altimeter, with digital barometer, digital compass, weather forecast, time, calendar, thermometer, and backlight
-The device is based on the technology of electronic bearing sensor and barometric sensor. 
-The digital altimeter is designed for outdoor use, the detachable string makes the digital compass a perfect hand-carry device for various outdoor activates. 
-It will give you backlight when you press any button in any time. 
-Forecast the weather for the forthcoming 12 to 24 hours basing on barometric pressure changes. 

Specification :
Waterproof Level:IPX4; 
Clock Format:12/ 24; 
Calendar:Perpetual Calendar; 
Display:LED Backlight; 
Height Range:-500~8000 m; 
Compass Range:0° to 359°, 1-16 Pointer (Graphic); 
Relative Height Measurement Accuracy:±3.0 m; 
Absolute Height Measurement Accuracy:±12 m; 
Angle Measurement Accuracy: ± 8°; 
Temperature Measurement Range:-20 to + 60°C (-4 to +140°F); 
Temperature Accuracy:+/- 1.0 °C; 
Measurement Temperature Interval: 60 sec In Normal Weather / 3 sec Altitude Measurement; 
Air Pressure Resolution:0.1 hPa (0.1 mmhg, 0.01 inHg); 
Pneumatic Accuracy:+/- 1.5hPa; 
Power Supply: 3V Lithium Battery (CR2032) Included; 
Battery Life:6-12 months; 
Size:5 x 9 cm; 

Package Includes:
1 x Digital Compass; 
1 x CR2032 Battery; 
1 x English Manual