Specifications:
1. Shell material: High permeability and corrosion-resistant PC/Germany Bayer 2805
2. Button material: Stainless steel
3. Waterproof ring material: Amorphous highly active silica gel
4. Material of the connecting shaft between the main body and the rear cover: 304 stainless steel with high hardness
5. Product size: Length 17.5 x width 7.5 x height 3.5 mm
6. Product weight: 165 g