BOAMIGO Sport Men's Analog-Digital Chronograph Watch with Black Silicone Band Wristwatches F108-1 Function:chronograph,date&day display,alarm,EL backlight,stopwatch,Dual Time Movement (Caliber): Dual- Precision Japanese Quartz Crystal/Glass material: Anti-Scratch glass:Strap/Bracelet material: Rubber Series: BOAMIGO CHRONOGRAPH Size of band lug (mm): 26:Size of band (mm): 180-240