Features: - Strap Material: Advanced environmental PU Strap - Case Material: High qulity ABS engineering plastics - Mirror Materials: Senior acrylic mirror material - Clasp Type: Buckle - Function: Alarm,Stopwatch,Luminous - 30 meters water resistant.(Please Don't Press Any Key Underwater) - Full Length: 23cm - Minimum Wear Length: 15cm - Dial Diameter: 3.9cm - Dial Thickness: 1.4cm - Strap Width: 1.6cm - Strap Thickness: 0.22cm - Weight: 28.3 g