The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. hero-video Merchant video How to connect the bluetooth? Keep your phone's bluetooth turn on,Long press "ON/OFF" button and bluetooth connection, then you can choose the music what you like and enjoy the boxing Can it workout for adult or kids? Yes.It can workout for adult and kids. Suit for all age if you want to try. How to adjust the volume of the machine? Long press the "Speed"button to increase the volume. Long press the "Mode"button to decrease the volume. If the machine i bought with some trouble, how can i do? Please come bakc to amazon, and "ask question" we will be there 24-hours online. We will help you solve any question of the machine. If the machine missing with golvesor charing cable, if the machine does not work well, How can i do? Please keep in touch with us first time, We will arrange the new replacement for you, We need to re-confirm your adress to resend, so please reply for us in time.