Case thickness: 13 mm case size: 57 mm strap width: 28 mm Band Material: Stainless Steel Black Tone Inner Band Circumference: 200+/-5mm Clasp Type: 2-button folding clasp Glass Type: Mineral Crystal with Black Dial with Black Tone Stainless Steel Case Water Resistant: 3ATM 30M Chronograph Multifunctional sports watch with stopwatch function most watches display two or three sub-dials to measure seconds minutes and hours unless the watch is digital.