Hey guys today I am going to share my experience about this product that is Opta Fitness Series. Actually I bought this product from an online store because I was getting the product in a discount price.After I received the product, i found that the design is cheap looking.I tried it for the first time and I found that this watch was showing up faulty readings as well as the heartbeat rate was not accurate.Although the main reason for buying the product was to track my heart beat rate and pulse rate but unfortunately the non accurate readings made me disappoint.Though the battery backup is around 3 hrs but it takes too much time to get charged.So as a result buying this watch was a waste of money and I will not recommend this product to any one.