4.0 wireless low-energy health bracelet with TPU detachable strap for charging. This smart watch is great to monitor your health by tracking how active you are in your day-to-day life. It has several functions such as sedentary reminder, blood pressure, heart rate, and incoming call and social media notifications. The smart and slim design make this watch a stylish accessory to wear during the day. Connect the smart bracelet with your iOS or Android smartphone and track your health with a free downloadable app (iOS and Android). Detach the strap to charge the rechargeable Li-pol 150mAh battery. Thanks to low-energy usage it has a great battery life.