A standard USB A male-to-USB A male cable should work. The old Web page on the CnMbook Silver
(another Anyka AK7802 device like the VL-760
) said that the sync cable that came with that device is used for the reflash procedure, but the CnMbook I have didn't come with that cable, so I tried a standard USB A male-to-USB A male cable, and it syncs fine with that, so I'm assuming it'll also work for reflashing.
(I'm wondering if flashing one of the CnMbook ROMs would enable ActiveSync connection in the VL-760. The VL-760 manual says it supports ActiveSync, but that's not true. At least the one I got doesn't.
)