Using these Behringer SD251-CK studio monitoring earphones is easy. First, choose the right size of foam or silicone ear - plug that fits your ear comfortably. Then, place the earphones in your ears with the cable going over your ears for stability. Connect the earphones to your audio device using the 360 - degree rotating gold - plated MMCX lock - snap connector on the detachable cable. You're ready to enjoy high - quality audio. When using them, make sure the volume is at a safe level to protect your hearing. Avoid exposing the earphones to extreme temperatures or moisture. After use, put the earphones in the included zipper case to protect them. Periodically clean the ear - plugs to keep them hygienic and the sound clear. If the cable gets dirty, you can gently wipe it with a soft, dry cloth.