- Strap material: rubber 2. Case material: rubber 3. Bottom cover material: stainless steel 4. Mirror material: plexiglass 5. Dial diameter: 38mm/1.5inch 6. Strap width: 18.21mm/0.72inch 7. Dial thickness: 10.35mm/0.41inch 8. Strap thickness: 1.6mm/0.06inch 9. Waterproof grade: 50m waterproof 10. The watch body is made of silicone material, which is shock-resistant and fall-resistant 11. Thin and light design, fit the wrist and wear comfortably 12. Using plexiglass mirror surface, wear-resistant and scratch-resistant 13. Built-in battery: 377 button battery x 1 (delivery with battery) 14. Product net weight: 23 grams 15. Packing: OPP bag