Phoenix Multi-Function Men's Quartz Watch Yellow Silicone Strap And Black Tonneau Dial Casual Watch For Daily Street Style SportyGift black.1. Automatic Mechanical Movement – “Perpetual Motion Art on Your Wrist!” No battery required, witness the magic of mechanics. The meticulously crafted movement transforms every movement of your arm into a continuous source of power. Enjoy a reliable and worry-free modern timepiece experience – an essential accessory for trendsetters. 2. Stainless Steel