Outdoor travel multi-function pointer altimeter barometer altitude table BKT381 portable mountaineering

Product Category: Compass
Material: rubber
Strap material: cotton / cloth
Function: altitude, multi-function, compass, air pressure, altimeter, other
Whether luminous: no
Is it waterproof: yes
Goods number: BKT381
Specifications: 68mm (diameter) × 85mm (length) x67mm
Gauge type: altimeter, height gauge
Error: ±20 meters