I Kall W1 1.52 Inch Round display Smartwatch comes with Wireless Charger you can wear it when workout Heart rate (24-hour automatic heart rate monitoring) Sleep (Record normal sleep (excluding short break): light sleep time, deep sleep time, total sleep time. Support multiple exercise modes Alerts: Receive alerts from calls, SMS, email, calendar, Facebook, Twitter, WhatsApp, LinkedIn, Instagram, etc.. Super Large Battery: One full charge can support 4-7 days of usage