Compatible with select Apple and Android devices Works with phones running Android OS 4.4 or later (excluding the Go edition) or iOS 9.3 or later. Supported features may vary between platforms and countries. Calendar, SMS, and e-mail notifications Keep you updated on day-to-day happenings. Stainless steel case, 20mm stainless steel watch band Ensure durability and create an elegant look. Water-resistant design Defends your smartwatch against submersion in up to 98' of water. Wireless connection to your device The Bluetooth connectivity and NFC technology enable simple one-touch pairing. Music control Allows you to adjust the volume, play, pause, and skip songs on your device. Comprehensive monitoring Tracks distance, calories burned, activity, heart rate, and steps taken. Voice commands Let you make and answer phone calls, send and receive text messages and e-mails, create calendar events, check the weather and GPS directions, set alarms, and search the web for simple hands-free use. Rechargeable battery Charge it easily using the included wireless charging dock. Vibrate mode Quietly alerts you to a range of notifications, such as incoming e-mails, calls, text messages, and upcoming calendar events. This watch has been worn daily and there is noticeable scuffing to the band (which can be replaced). The crystal has only faint scuffing. No actual damage to the watch, just normal wear.