Hey there, myself govind and this is my review about the honor band 3 based on my experience. I got this honor band 3 activity tracker for 2799 rupees, although it seems very priced but it does the job very best and got more than you can expect. heart rate is very accurately tracked. It has battery backup up to 30 days on a SINGLE CHARGE. Very good alarming system that even tracks the sleep like light, deep or REM sleep. You can also track your swimming time with total calories burned. It is water resistant can go upto 50 meters thats more than you want. It has a notification system that gives you caller id information. This is one of the best band you can find in online stores. Im vey much satisfied with this product.