HeHa Health Data Watch Waterproof Sports Watch with Calorie Counter Bluetooth Fitness Fit Tracker with Heart Rate Monitor Watch Health checking - We all have bad days, when we feel stress, ineffective. Do not know what to do? With HeHa Qi fitness health monitor, take the stress test and measure your stress levels and test your balance of Sympathetic. Test your restoration, biological age and BPM at the same time. HeHa Qi will provide daily health tips of each indicators. After measure your stress levels, you could continue the 3-min breathing training to help relax body and reduce stress The HeHa Qi fitness tracker combine activity tracker, calorie counter, step tracker and sleep monitor together. Tracking and storing activity data of recent 7 days then sync data to HeHa mobile app via bluetooth. It has a screen to display the records of the number of steps you have walked and calories that you have burned. The HeHa app will analysis how long you slept, and how many times you were restless or woke up, and it supports IOS 7 / iPhone 5 or Android 4.0 above Heart rate variability(HRV) - is a relatively new method for assessing the effects of stress on your body. A biomarker showing promise as a broad indicator of overall health and fitness, or the variation in the intervals between heart beats. With smart phone app, easy to know your stress, fatigue and even burnout It's important a fitness tracker has a long battery life. You know there's not much point in having a fitness tracker sitting at home on charge while you're out running. The HeHa Qi has a battery life for nearly 30 days based on a daily usage of 16 hours in walking mode, 8 hours in sleep mode, 3 Qi index measure and 1 breathing training. Waterproof IPX7, it works for almost anything you can throw at it on a typical day, no matter splashes, rain or snow, showering even hot/cold water Buy with confident: Items shipped from Amazon and can be returned within 31 days