New XRS321-C Sound Bar Remote Control work for vizio SS2520-C6 SB3820-C6 SB3821-C6 SB2920-C6 SS2521-C6 sound bar BRAND NEW ORIGINAL VIZIO SOUND BAR REMOTE CONTROL XRS321-C. Working for the below models: SS2520-C6 SB3820-C6 SB3821-C6 SB2920-C6 SS2521-C6 No need any program, only put into new battery can work well!! USA SELLER, quick shipping! 30 days quality warranty if have any issues, please feel freely to contact with us by amazon message system, we promise to feed back to you within 24 hours, thanks