Features: LED backlight 50 meters waterproof 12/24-hour format Calendar week display Stopwatch timing(1/100second) Three groups of alarms Manual sleep function Countdown function Function: LIGHT BUTTON DATE DISPLAY WEEK DISPLAY MODE BUTTON START/PAUSE BUTTON TIME DISPLAY ADJUSTMENT BUTTON ROTATING CROWN Material: Case and Band: PU (Polyurethane) Mirror: PMMA (Acrylic) Cast back cover and clasp: stainless steel Specification: Dial Case Diameter=2.08 inches / 5.3 cm Dial Case Thickness= 0.74 inches / 1.89 cm Band Length= 10.23 inches / 26 cm Band Width= 0.85 inches / 2.18 cm Weight= 63 Grams Product details Men's Digital Sports Watch x 1 Manual x 1