1. Strap material: PU plastic 2. Case material: ABS plastic 3. Bottom cover material: stainless steel 4. Mirror material: acrylic resin mirror 5. Dial diameter: 32.2mm 6. Strap width: 20.7mm 7. Case thickness: 10.5mm 8. Function: Luminous, Alarm, WR50M Waterproof, Hourly Timekeeping, Running Second, Day and Date Display, 12/24 Hours 9. Waterproof: WR50m 10. The strap is made of PU plastic material, which fits the wrist and is soft and comfortable 11. Plastic case, light and durable, texture buttons, convenient operation 12. Thickened and hardened acrylic mirror surface, clear and durable 13. Built-in battery: CR2016 button battery x 1 (delivery with battery) 14. Product net weight: about 22.1 grams 15. Packing: OPP bag