Hey guys, Here I am sharing my honest opinion about this headphone . Boat rockerz 400 is the wrost headphone that I had used in 2019. If you move from one room to another room then it will be disconnected from your mobile. It also disconnects while, you cover your mobile or put your mobile in your pocket.I brought this wrost headphone from Amazon in 2019.It was broken from the center after using it only for 3-4 months. However it provides a good quality of audio & base but the built quality is very poor.It provides very slow response while connecting to a device. At one time it can be connect with only one device . The only feature that I liked in this headphone is that it’s base. Therefore don’t buy this headphone, unless you want to waste your money.