I bought this product online.in this price range it was the best product every I saw. the headset build quality was preety good.and it was assume finish cut and nice rubbarize for long time ussage. it’s battery life was just fantastic.On a single charge( 2hour) the headphone countinuiesly ussage( full volum) it will least 8 hour. and it will standby for a day. by the way its battery life just assume. let’s talk about boAT Rockerz 400 sound quality it was just massive. when I playing some heavy bass boosted song the headphone was never down or getting low when beat on. when come the heavy beat the headphone handel it smoothly and it was just amazing.another thing is that its connectivity. this headset bluethooth connection was very nice. in long distance and over the wall the headphone was playing song perfectfully and that time no connection lost problem.in the box the aux cable build quality very good. it have rubbarized finish and strong metrial make it very good quality and strong aux cable.in my personal openion it was it was best bujet bluetooth headset under 2 thousnads.