Korean high-grade steel business calendar full calendar men's watch quartz watch waterproof Black Header: European zinc alloy, Environmental Electroplating,Rurable, EU ROHS standard Strap: Using 201 Stainless steel grinding, polishing by technology, to ensure no rust, no fade Movement: Japan Quartz Movement PC21S Function: life waterproof, Luminous, lighting, Applicable gift-giving occasions: advertising and promotion, business gifts, holiday, housewarming, birthday Battery: Battery with Japanese brand 377