Included Components: Chest Strap *1, CooSpo heart rate monitor sensor *1, User Manual *1 Package Weight: 0.09 Kilograms Item Package Dimensions: 25.98 x 14.96 x 5.71 inches Features: CooSpo Heart Rate Monitor Armband: Patented optical sensor technology for highly accurate heart rate monitoring and measurement. It support continuously measure real time heart rate data during exercise.HW706 armband heart rate monitor can help you track and capture real-time heart rate, training zones and calories burned on your smartphone or tablet with compatible training apps. Bluetooth4.0 & ANT+ Doul Mode: Compatibility with Bluetooth4.0 & ANT+ - Great for work with smartphones, tablets, Garmin, Wahoo sport watches,Peloton equipment and many other devices which support Bluetooth4.0 & ANT connection. Third Party App: CooSpo Heart Rate Armband Monitor works with most popular health and fitness apps, including: Run keeper, map my fitness, Strava, PEAR - Personal Fitness Coach,Polar beat,DDY yoga And all applications that support the standard Bluetooth protocol. Rechargeable Battery: The heart rate monitor armband comes with a rechargeable battery that allows you to work out up to 25+ hours with single charge. IP67 Waterproof: Ip67 waterproof construction can be submerged up to 1 meter underwater.Stable work in rainy day and sweating. Indoor and outdoor sports both great to use. But do not use for swimming. Comfortable Wearing: The heart rate monitor armband paired with a comfortable fabric strap that lets you ride without distraction. Each package comes with 2 straps, it can support you daily replace use. Notice: The heart rate sensor is IP67 rated waterproof, but does not support swimming. Wipe off sweat promptly during exercise, too much sweat may affect the measurement. Friendly Tips: