Z6 Activity Wristband-Black The product is shipped based on the color or size of the main image of the product page. With this affordable and stylish Z6 activity bracelet, you can more easily keep track of your health and exercise Activity Bracelet gives you information about your heart rhythm, blood pressure and oxygen level. Thanks to the ergonomic and adjustable strap, it sits comfortably on the wrist for round-the-clock use. In addition, the watch analyzes your sleep, to help you optimize it and gives you notifications about incoming calls, SMS and social media. The activity bracelet is compatible with both Android and iOS. - Measures your heart rate, blood pressure and oxygen level - Calculates calories burned and walking distance - Get notifications from incoming calls, SMS, and social media - Measures your sleep and sleep pattern Specifications : Color: Black Material: Silicone Duration: 21 cm Model: Z6 Compatibility: Android 5.1+, iOS 8.0+ Application: JYouPro Bluetooth: v4.0+ Battery Capacity : 105 mAh Battery life (operating): Up to 7 days Standby Battery Life: Up to 15 days Power Connector: USB Charging