Guess Connect Ace Men's Watch Smartwatch C1001G1 Stainless steel case, silver colored and gray coating, mat / polished Silicone strap, black, pin buckle Compatible with separately sold 23 mm accessory straps Touchscreen, AMOLED 390 x 390 Multi colored dial, various dial designs can be selected Functions: Fitness trackers, standalone apps, text messages + voice search, read time, calendar and much more Operating system: Wear OS by Google / Qualcomm Snapdragon Wear 2100 App support: iOS 9+ / Android 4.3+ Charging: POGO pin, 24 hours run time Case width approx. 44 mm Case height approx. 12 mm Strap width approx. 23 mm Strap length standardDelivery with box and quick start guide. For environmental reasons, operating instructions and further information are available on the manufacturer's website (https://shop.guesswatches.com/customer-service.html#user-manuals). Smartphone not included!