The&nbsp;D21 Multi-functional Heart Rate Monitor Waterproof Sports Bluetooth Smart Wristband Bracelet with NFC displays health parameters including time and date, steps, distance, calories as well as heart rate on its 0.66" capacitive touch screen. Adjustable wrist band provides a custom fit so you can wear it during outdoor activities, sports and rigorous workouts. Built-in sleep monitor records your sleep patterns while sedentary reminder helps you promote a healthy lifestyle. Silent alarm gently vibrates to wake you up without disturbing people around you. All these data can by synchronized to smartphone for further analysis. Live an active life with D21!<!--Features --><p>FEATURES</p><UL><LI>0.66" capacitive touch screen with quick response and high sensitivity</LI><LI>Display health parameters including time and date, steps, distance, calories as well as heart rate</LI><LI>Heart rate sensor accurately monitors your heart rate variation 24 hours a day</LI><LI>Built-in pedometer keeps track of your daily activities and calculates calorie burned</LI><LI>Sleep monitor records your sleep patterns</LI><LI>Sedentary reminder helps you promote a healthy lifestyle</LI><LI>Silent alarm gently vibrates to wake you up without disturbing people around you</LI><LI>Notify you of incoming calls and text messages</LI><LI>All data can by synchronized to smartphone for further analysis</LI><LI>Built-in G-sensor, light up screen at a simple flip of the wrist</LI><LI>Support NFC connection, automatically transmit data at 5cm response distance</LI><LI>Adjustable wrist band fits comfortably on wrists of different sizes</LI><LI>Simple sleek design, lightweight and highly portable</LI><LI>Please notice that this wristband is only splashproof, do not wear it to swim or bath</LI></UL><!--Specifications --><p>Specifications</p><TABLE class=ke-zeroborder border=0 cellSpacing=0 cellPadding=0 width="100%"><TBODY><TR><TD width=131>Model</TD><TD width=365>D21</TD></TR><TR><TD width=131>CPU</TD><TD width=365>nRF1822 (Cortex M0 16MHz)</TD></TR><TR><TD width=131>Memory</TD><TD width=365>256K</TD></TR><TR><TD width=131>Display</TD><TD width=365>0.66" Capacitive Touch Screen</TD></TR><TR><TD width=131>Resolution</TD><TD width=365>64 x 48 Pixels</TD></TR><TR><TD width=131>Bluetooth Version</TD><TD width=365>4.0</TD></TR><TR><TD width=131>Battery Capacity</TD><TD width=365>80mAh (Standby Time Depends on Actual Using Situation)</TD></TR><TR><TD width=131>Charge/Data Port</TD><TD width=365>Specilaised Charging Port</TD></TR><TR><TD width=131>Sensor</TD><TD width=365>G-sensor</TD></TR><TR><TD width=131>Waterproof</TD><TD width=365>Yes</TD></TR><TR><TD width=131>IP Rating</TD><TD width=365>Life Water Resistance</TD></TR><TR><TD width=131>Material</TD><TD width=365>Plastic</TD></TR><TR><TD width=131>Color</TD><TD width=365>Black</TD></TR><TR><TD width=131>Dimensions</TD><TD width=365>(6.10 x 1.38 x 0.79)" / (15 x 3.5 x 2)cm (L x W x H)</TD></TR><TR><TD width=131>Weight</TD><TD width=365>0.99oz / 28g</TD></TR></TBODY></TABLE><IMG alt="" src="http://www.image-tmart.com/info_images/82030023-1.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82030023-2.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82030023-3.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82030023-4.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82030023-5.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82030023-6.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82030023-7.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82030023-8.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82030023-9.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82030023-10.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82030023-11.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82030023-12.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82030023-13.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82030023-16.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82030023-17.jpg"><IMG alt="" src="http://www.image-tmart.com/info_images/82030023-18.jpg"><!--Package Includes --><p>Package Includes</p><UL><LI>1 x Smart Bracelet</LI><LI>1 x User Manual</LI><LI>1 x Charging Cable</LI></UL><!--Extra Info --><!--produts_compatibility -->