After all this product is very good.but its battery life is bad.battery discharged very soon.if you battery at 100% it work 1 to 2 hours. but features and style are amazing.it had a SIM slot and a Bluetooth.this product you use when you went for jogging.it had a feature called calorie meter it calculates your calorie.If you need features it’s for you or if you need battery life it’s not you.i use this product it not so goot or not very bad.