diybypass parking brake bypass for all sony & boss radio models: xav, xav-bt, xav-dvd, xav-ax, xav-ax-sxm, xav-bt, xav-w-bt, bcpa-rc, bv, bv-b, bv-blc, bv-bi, bv-nv, bvcp-a, bvnv-rc diybypass you're looking at the newest in technology that is programmed down to the thousandth of a second for extreme accuracy. with this new bypass, timing is everything!!! several seconds of delay and multiple ground pulses at the rights points in time are needed in order to accurately bypass the parking brake feature of some of the most complicated dvd and navigation units. diybypass is compatible with all 2016-2020 and earlier pioneer avh, mvh, dvh, and appradios (2,3,4), kenwood, clarion, sony, jvc, alpine, boss, video units. bypass is manufactured to work with next model releases.